Physics High School

## Answers

**Answer 1**

The car travels a **distance** of **820m** in the first 34s after the light changes to green.

**Acceleration, a** = 2ms⁻²

**Initial velocity, u** = 0 ms⁻¹ (Since the car start from rest)

**Final velocity, v** = 20 ms⁻¹

From **first equation of motion,**

**v - u = at **

20 - 0 = 2 × t

20 = 2t

t = 10s

From **second equation of motion,**

**S = ut + ¹/₂ at²**

Distance travelled during 10s:

S₁ = 0 × 10 + ¹/₂ × (10)²

S₁ = 100m

Distance travelled for the remaining 36s:

S₂ = v × t

S₂ = 20 × 36

S₂ = 720m

**Total distance** travelled:

S = S₁ + S₂

S = 100 + 720

** S = 820m**

Therefore, the car travels a **distance** of **820m** in the first 34s after the light changes to green.

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## Related Questions

Venus has the smallest orbital eccentricity of any of the planets. What is the eccentricity of Venus?(1 point)

Responses

1.0300

0.8040

0.0068

0.0000

### Answers

The **eccentricity** of **Venus** is = **0.0068**. That is **option C.**

What is orbital eccentricity?

The **orbital eccentricity** is defined as the measurement that is used to show how an orbit deviates from the shape of a **circle**.

The **Venus** is one of the planets of the universe that is the second closest to the sun.

The **Venus** is one of the planets that has a small orbital eccentricity being 0.006772 which is approximately 0.0068. This means that it is closest to being circular in shape.

The planets with the largest orbital eccentricity is the planet Mercury with **orbital eccentricity** of **0.2056**.

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A runner is jogging in a straight line at a steady [tex]v_{r}[/tex]= 4.5 km/hr. When the runner is L= 8.1 km from the finish line, a bird begins flying straight from the runner to the finish line at [tex]v_{b}[/tex]= 13.5 km/hr (3 times as fast as the runner). When the bird reaches the finish line, it turns around and flies directly back to the runner.

What cumulative distance does the bird travel? Even though the bird is a dodo, assume that it occupies only one point in space (a “zero” length bird), travels in a straight line, and that it can turn without loss of speed. Answer in units of km.

After this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. The bird repeats the back and forth trips until the runner reaches the finish line.

How far does the bird travel from the beginning (including the distance traveled to the first encounter)? Answer in units of km.

### Answers

**Answer: 1325t miles **

**Explanation: you have to divide all of them **

A student contends:

"If I climb up a mountain at 1 mile per hour for 2 hours and then turn around and climb back down at 3 miles per hour, then my average speed will be 2 miles per hour."

What, if anything, is wrong with this statement? If something is wrong, identify it and explain how to correct it. If this statement is correct, explain why.

### Answers

The statement is **wrong **and the correct **average speed **of the student will be 3/2 or 1.5 **miles per hour**.

Given in the question,

The student climbs the **mountain **at a **speed **of 1 mile per hour, then the **distance traveled **by the student uphill is given by

**Distance = Speed × Time, **

Put in the values, we get

Distance = 2 × 1 = 2 miles

So the student **travels **2 **miles **uphill and turns around and climbs back at 3 **miles per hour**.

So the time taken by the **student **to climb back is given by

**Time = Distance/Speed**

Time = 2/3 hr

So Now

**Total distance **traveled by the student = Uphill climb + Downhill Climb

Total distance traveled by the student = 2 + 2

**Total distance** traveled by the student = 4 miles

**Total time taken = Time to climb uphill + time to climb downhill**

Total time taken = 2 + 2/3 hr

**Total time** taken = 8/3 hr

Now average speed is given by the formula,

**Average Speed = Total Distance traveled/Total Time taken**

Average Speed = 4 / (8/3)

Average Speed = (4 × 3) / 8

Average Speed = 12 / 8

**Average Speed** = 3/2 miles per hour

Therefore, the statement that the **average speed **will be 3 miles per hour is **wrong **and the **correct** **average speed **of the student will be 3/2 or 1.5 **miles per hour**.

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Suppose that a classroom has 10 light bulbs. The probability that each individual light bulb works is 0. 6. Suppose that each light bulb works independently of the other light bulbs. What is the probability that all 10 of the light bulbs work?.

### Answers

The probability is **0.006**

The probability of a light bulb that works is 0.6 and that a bulb would not work is 0.4 (0.6+0.4 = 1.0)The key to this question is the state that says each bulb's working condition is independent of others.That means you could treat the probability of a bulb individually towards the final/asked probability.You may **recall your memory of the fact**, the **probability of 2 individual events happening at the same** time is given by [tex]P(A\cap B) = P(A)\times P(B)[/tex], and this is applied to 10 events here in this question.You only need to focus on the happening that each bulb works and if that happens, only the probability of a bulb that works is to be considered.Therefore, the probability of all bulbs working would be calculated as follows,

[tex]\begin{aligned}\\\\P &= 0.6\times0.6\times0.6\times0.6\times0.6\times 0.6\times0.6\times0.6\times0.6\times0.6\\\\&= 0.0060466\\\\&\approx0.006\end{aligned}[/tex]

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In a first order decomposition, the constant is 0.00134 sec-1. what percentage of the compound is left after 4.71 minutes?

### Answers

In a first order **decomposition **after 4.71 minutes, 37.8% of the **compound **is left.

Calculation

**A = A0e-kt**

A/A0 = e-0.00134t, [k = 0.00299, divide both sides by A0]

A/Ao = e-0.00134*282.6, [t = 4.71 min*(60 sec/ 1 min) = 282.6 sec]

A/A0 = .3786 = 37.8%

What is order of Decomposition?

Invertebrate creatures go through five general stages of decomposition: fresh, bloat, active decay, **advanced decay**, and dry/remains.

What is telecom order decomposition?

The **procedures **for breaking down a sales order into **numerous **work orders or **service orders **are outlined in the **Order Decomposition **section.

One sub-order can be created for each business line in a **Triple Play Telco Sales **order, which includes three services: **landline**, Internet, and **wireless**.

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After Thanksgiving, Kevin and Gamal use the turkey's wishbone

to

make a wish. If Kevin pulls on it with a force 0.17 N a larger than

the force Gamal pulls

with in the opposite direction, and the

wishbone has a mass of 13

g, what is the wishbone's initial

acceleration?

### Answers

According to the given statement the wishbone's initial **acceleration** is **13.08 m/s².**

How does acceleration work?

**Velocity's** rate of change with time, both in terms of speed and direction. A point or item going straight ahead is **accelerated** when it increases or decelerates. Even if the speed remains constant, **motion** on a circular **accelerates** so because direction is always shifting.

Briefing:

In this task, we calculate the **acceleration** for a given force and the mass on which the force was applied.

F[tex]_n_e_t[/tex] = 0.17 N

m = 13g

m = 1.3 × 10⁻² kg

a =?

F = m × a

a = F/m

a=0.17 N/1.3× 10⁻² kg

a=13.08 m/s²

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the earth has a radius of about 6.35106 m and a mass of 5.981024 kg. what would be the radius if the earth had the same mass density as matter in a nucleus? the mass density of a nucleus is about 2.41014 g/cm3

### Answers

The **radius of Earth** to have the same mass density as matter in a nucleus** is** 1.80 x 10^3 m.

The **density **of a body is given by the following expression;

Density = Mass/Volume

Let the **radius** of Earth be r.

As the earth is **a sphere**, hence its** volume** will be 4/3 x π x r^3

So, the equation becomes

Density = Mass/(4/3 x π x r^3)

The **mass **of the earth is given as 5.98 x 10^24 kg and the **density** of the nucleus is given to be 2.4 x 10^14 m.

2.4 x 10^14 = 5.98 x 10^24/ (4/3 x 3.14 x r^3)

On Solving the above equation, the radius r comes out to be

r = 1.80 x 10^3 m.

Hence, The** radius of Earth** to have the same mass density as matter in a nucleus** is** 1.80 x 10^3 m.

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J. J. Thomson used a cathode-ray tube to calculate the charge-to-mass ratio of the electron. Which of these suggested the presence of a negative particle?.

### Answers

J. J. Thomson used a **cathode-ray** tube to calculate the charge-to-mass ratio of the electron. The deflection of cathode rays towards the **positively charged surface** and emission of green light at the far end of the tube confirmed that they are negatively charged particles.

In 1897, J.J Thomson performed a **cathode ray** tube experiment to determine the charge-to-mass ratio of electrons.

Due to high voltage, a beam of particles was allowed to flow from the negatively charged end to the positively charged end of the tube.

One end of the tube was painted with phosphorous. When electrons struck the wall a green spark was observed which confirmed the presence of negatively charged particles i.e. electrons.

To put it simply, cathode rays came from the cathode tube and deflected towards a **positively charged plate** showing that they are negatively charged particles.

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You drive in a straight line at 20.0 m/s for 10.0 miles, then at 34.0 m/s for another 10.0 miles.

the average speed?

### Answers

The **average speed** for the two events is **25.2 m/s**

**What is Average Speed ?**

Average speed is the **ratio of the total distance travelled by a body to the total time**. It is measured in m/s

If you drive in a straight line at 20.0 m/s for 10.0 miles, then at 34.0 m/s for another 10.0 miles. To calculate the average speed, first **convert the mile to meter**

1 mile = 1609.34 m

10 miles = 10 × 1609.34 = 16093.4 m

Calculate the **time** for **each event. **

speed = distance / time

**time = distance / speed**

T1 = 16093.4 / 20

T1 = 804.67 s

T2 = 16093.4 / 34

T2 = 473.34 s

Total time t = T1 + T2

t = 804.67 + 473.34

**t = 1278.01 s**

Total distance s = 16093.4 + 16093.4

**s = 32186.8 m**

Average speed = s / t

Average speed = 32186.8 / 1278.01

**Average speed = 25.19 m/s**

Therefore, the **average speed** for the two events is **25.2 m/s** approximately.

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an object moving in 1-dimension along a horizontal surface denoted as the x-axis. the object is initially moving in the positive x-axis direction and the rate of energy decrease of the object is proportional to the square of its speed.

### Answers

The **acceleration** of the moving object can be defined by [tex]a_x = mv^{2} _0 * \lambda/(\lambda v_0t + m)^{2}[/tex].

What is acceleration?

In physics, **acceleration **is the rate at which the velocity of an object changes over time. They are vector quantities and accelerations. The direction of the net force acting on an item determines the direction of its acceleration.

**Acceleration **is the rate at which the speed and direction of a moving object change over time. A point or object is going ahead directly when it **accelerates **or **decelerates**.

the question is incomplete

An object moving in 1-dimension along horizonta surface denoted as the x-axis. The object is initially moving in the positive X-axis direction and the rate of energy decrease of the object is proportional to the square of its speed dE ~Avz In this equation A is a constant with units of kglm_ The speed of the object at b 0 s is Vo: What is the speed of the object as function of t > 62 HINT: since the object is moving along horizontal surface its energy is simply its kinetic energy: Substitute the equation for kinetic energy into the above differential equation for energy to determine the acceleration of the object:

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infrared radiation has wavelengths ranging from about 800 nm to 1 mm. what is the frequency of radiation of wavelength 960 nm? answer in units of s−1 .

### Answers

The frequency of radiation of the given **wavelength **is 3.125×[tex]10^{14}[/tex] Hz.

What is wavelength ?

Given λ = 960nm

f=c/λ

f= 3×[tex]10^{8}[/tex]/960×[tex]10^{-9}[/tex]

f= 3.125×[tex]10^{14}[/tex]

A waveform **signal's wavelength** is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through **space **or along a wire. This length in wireless systems is typically expressed in meters (m), centimeters (cm), or millimeters (mm).

The wavelength is the separation between two wave crests, while troughs have the same wavelength. The number of **vibrations **that pass over a specific place in a second is known as the frequency and is expressed in cycles per second (Hz) (**Hertz**).

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URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS

The diagram shows two girls pushing on a box with equal and opposite forces. Which statement best describes the forces required to move the box to the right?

### Answers

Answer: the forces must be unbalanced, with the force from the left greater than the force from the right.

Explanation:

What does the Law of Conservation of Mass say about a chemical reaction? (1 point)

O Mass increases as atoms are rearranged during a chemical reaction.

O To balance a chemical equation, additional mass may be created.

O Mass is not measurable in a chemical reaction.

© In a chemical reaction, mass is neither created nor destroyed.

### Answers

The Law of Conservation of **Mass** states in a chemical **reaction**, **mass** is neither **created** nor **destroyed** and is therefore denoted as option** D.**

What is a Chemical reaction?

This is defined as the process in which substances referred to as **reactant** combine together form new ones which is referred to as **product **which is usually based on various types of factors.

Antoine **Lavoisier** discovered that **mass** is neither created nor destroyed in a chemical **reaction** which is therefore the reason why the same number of **atoms** of elements on the **left** hand side is always equal to that on the **right** hand side.

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An object is lifted from the surface of a spherical planet to an altitude equal to the radius of the planet. As a result, what happens to the mass and weight of the object?.

### Answers

**Answer:**

SEE below

**Explanation:**

MASS is a measure of the amount of matter in an object....it will remain the same ....

WEIGHT is a measure of gravitational pull on the object and is inversely dependent on the square of the distance between the two bodies...so weight will be LESS than on the surface of the planet

Suppose a plane accelerates from rest for 30 s, achieving a takeoff speed of 80 m/s after traveling a distance of 1200 m down the runway. A smaller plane with the same acceleration has a takeoff speed of 40 m/s . Starting from rest, after what distance will this smaller plane reach its takeoff speed?

### Answers

**Answer:600 m is required for smaller plane to reach its takeoff speed. ... So 300 m is required for smaller plane to reach its takeoff speed.**

**Explanation:**

**Answer:**

300 m

**Explanation:**

Find acceleration of first plane

v = a t

80 = a (30) shows a = 2.67 m/s^2

For the smaller plane

v = at

40 = 2.67 t shows t = 14.98 seconds

d = 1/2 a t^2

= 1/2 2.67 (14.98^2) = 299.6 = ~ 300 meters

Explain why astronomers use light years or astronomical units to describe distances in space instead of miles or meters.

### Answers

Both the solar system and interstellar space are very large. 150 million kilometers are equivalent to one **astronomical** unit. Instead of having to count everything in millions or billions of kilometers, it is much simpler to count the distances if they are in counts of** Astronomic** Units.

Why light years are used as a distance measurement in astronomy?**Astronomers** can establish how far back in time they are looking by measuring in light-years. Everything we see in the night sky has already happened since it takes light time to reach our eyes. In other words, if you see something from a distance of 1 light-year away, you see it precisely as it was a year ago.However, the fundamental justification for utilizing light years is due to the vast distances we deal with in space.Due to the fact that objects in space are too far apart from one another, **astronomers** measure distance in space using an astronomical unit called a light-year rather than kilometers. The distance that a beam of light travels in a single year on Earth is referred to as a "light-year."By counting the wavelengths—the separation between successive peaks of the wave pattern—between two places, laser light is commonly employed to measure distances. The approach is inherently very precise due to the short wavelength (633 nanometers for the most common red light utilized).

Why do astronomers use light years or astronomical units to describe distances in space instead of miles or meters?

Both the solar system and interstellar space are very large. 150 million kilometers are equivalent to one **astronomical** unit. Instead of having to count everything in millions or billions of kilometers, it is much simpler to count the distances if they are in counts of **Astronomic **Units.

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A control is the___by which test___ can be compared.

### Answers

A **control** is the **standard** by which **test** **variables** can be compared.

What is an experiment?

An **experiment** is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.

In an **experiment**, controlling an **experiment** means designing an **experiment** so that the effects of one or more variables are reduced or eliminated.

A **control** is a separate group or subject in an **experiment** against which the results are compared.

Therefore, it can be said that a **control** is the **standard** by which **test** variables can be compared.

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A 500 kg pumpkin is dropped 15 m on

top of a school bus.

How much gravitational potential

energy was gained when it was

winched up 15 m?

Assuming all of this GPE is turned

into kinetic energy as the pumpkin

drops, work out its speed as it hits

the school bus.

### Answers

**gravitational potential energy** was gained when it was winched up 15 m is 73500 J.

GPE is turned

into kinetic energy as the pumpkin drops

Then,

pumpkin speed is 17.14 m/s.

What is gravitational potential energy?The potential energy that a huge item has in relation to another massive object due to gravity is known as gravitational energy or **gravitational potential energy**. When two objects descend toward one another, the potential energy associated with the gravitational field is released (transformed into kinetic energy). Bringing two things farther apart increases the **gravitational potential energy**.m, g, and h stand for mass, the gravitational constant (with a value of around 9.8 m/s), and height, respectively.

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On halloween, you take a glow stick, crack the capsule inside and shake it until it glows. This is an example of light energy being transformed from which type of energy?.

### Answers

When you take a glow stick, crack the capsule inside and shake it until it glows, is an example of light energy being transformed from **chemical energy**

Glow sticks are sticks that contain **chemical components **inside and when they are mixed, provide a fluorescent glowing effect.

To achieve the **reaction**, two basic components are needed: the activator (**hydrogen peroxide**) which determines the intensity and duration of the glow, and a **phenyl oxalate ester **together with a fluorine dye which gives the color.

At the beginning the fluorescent stick is not active because both liquids are separated, one is inside a sealed glass ampoule and the other is around the small tube, both inside the plastic cover.

When the glow stick is cracked, the glass rod breaks releasing the **oxalate**, this **mixes **with the **peroxide **generating a **chemical reaction **that is what creates that glows effect.

What is chemical energy?

Chemical energy is the energy that manifests itself in certain **chemical reactions **where **chemical bonds **are formed or broken.

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Give two examples of solids whose motion is: a) rectilinear translation. b) curvilinear translation. c) rotational.

### Answers

**Answer:**

b one is correct........I wish u give me mark as brainlliest

. You roll a tennis ball a distance of 18 meters. It takes 6 seconds to cover the distance. What is the average speed of the tennis ball?

I got 3 as an answer am I right

all I can offer is 14 points since that's all I have left lol

### Answers

The **average speed **of the tennis ball is **3 m/s.**

What is average speed?

**Average** **speed **can be defined as the ratio of the total distance to the total time covered by the body. The S.I unit of **average speed **is m/s.

To calculate the formula below.

Formula:

S = d/t............... Equation 1

Where:

S = Average speed of the balld = Total Distancet = Total time.

From the question,

Given:

d = 18 meterst = 6 seconds

Substitute these values into equation 1

S = 18/6S = **3 m/s**

Hence, The **average speed **of the tennis ball is **3 m/s.**

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Question 2 (1 point)

An object starts at rest and accelerates to a velocity of 8 m/s in

a period of 4 s. What is the acceleration of the object?

m/s²

### Answers

**Answer:**

2m/s²

**Explanation:**

acceleration it the change in velocity over the time taken

When jumping, a flea accelerates at an astounding 1500 m/s2 , but over only the very short distance of 0.44 mm . if a flea jumps straight up, and if air resistance is neglected (a rather poor approximation in this situation), how high does the flea go?

### Answers

When the **flea** jumps straight up, and if **air** resistance is neglected, the height of the flea will be 0.089m.

What is air resistance?

**Air resistance** acts as a force on objects moving through the atmosphere. This force acts in the opposite direction when a body is travelling through the air. Air resistance causes the moving body to experience **frictional** force. A body's speed decreases as it goes due to air resistance.

It should be noted that the **equation** of kinematics will be illustrated thus:

V = ✓(2 × 1500 × 0.44mm)

Therefore, h = V² / 2g

= (✓(2 × 1500 × 0.44mm)² / (2 × 9.8)

= 0.089m

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We have that the **flea **goes as **high **as

**h=0.0889m**

How high does the flea go?

From the Question, we are told that**Acceleration **=1500ms^2

**Distance **d=0.47mm

Generally, the equation for **height **is mathematically given as

h=\frac{u^2}{2 g}

Where

u^2=2 * 1500 * 0.44 * 10^{-3}

u=1.32ms

Therefore

h=\frac{1.32^2}{2 * 9.8}

**h=0.0889m**

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a circular cylindrical post with a circumference of 4 feet has a string wrapped around it, spiraling from the bottom of the post to the top of the post. the string evenly loops around the post exactly four full times, starting at the bottom edge and finishing at the top edge. the height of the post is 12 feet. what is the length, in feet, of the string?

### Answers

** **The** length **of the string **wrapped **around a circular cylindrical post is 20ft.

We have a **circular cylinder** and a **string **wrapped around it.

If we **unwrap** one complete revolution of string around the post. We have a rectangle. Having a **width **of 4ft (that is the **circumference** of the post.)

**height** of the post is 12 feet

Then **height** of the rectangle is. 12/4 = 3ft

The string evenly** loops around** the post exactly **four full times**, starting at the** bottom** edge and finishing at the **top** edge.

So the length of this is the h**ypotenuse **of right triangle sides 3 and 4

then length determined using** Pythagoras theorem**

L² = 3²+4² = 25

L =√25 =5ft

Here we have three more similar** triangles** in more 3** revolution**.

1 revolution×5+ 3revolution×5

4×5 =20ft

** **The** length **of the string **wrapped **around a circular cylindrical post is 20ft.

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an electron is to be accelerated from a velocity of 2.50×106 m/sm/s to a velocity of 9.00×106 m/sm/s . through what potential difference must the electron pass to accomplish this?

### Answers

Through **-212 V potential difference **must the electron pass to accomplish this

What is Potential difference?

The difference in **electric potential** between two points, which is defined as the effort required per unit of charge to move a test charge between the two places, is known as **voltage, electric potential difference**, electric pressure, or electric tension.

The initial kinetic energy of the electron is,

[tex]{K_i} = \frac{1}{2}mv_i^2[/tex]

Here, m is the mass of the electron and

is the initial velocity of the electron.

[tex]\begin{array}{c}\\{K_i} = \frac{1}{2}\left( {9.11 \times {{10}^{ - 31}}\;{\rm{kg}}} \right){\left( {2.5 \times {{10}^6}\;{\rm{m/s}}} \right)^2}\\\\ = 2.88 \times {10^{ - 18}}\;{\rm{kg}}\\\end{array}[/tex]

The final kinetic energy of the electron is,

[tex]\begin{array}{c}\\{K_f} = \frac{1}{2}\left( {9.11 \times {{10}^{ - 31}}\;{\rm{kg}}} \right){\left( {9 \times {{10}^6}\;{\rm{m/s}}} \right)^2}\\\\ = 3.68 \times {10^{ - 17}}\;{\rm{kg}}\\\end{array}[/tex]

[tex]\begin{array}{c}\\{V_1} - {V_2} = \frac{{3.68 \times {{10}^{ - 17}}\;{\rm{J}} - 2.88 \times {{10}^{ - 18}}\;{\rm{J}}}}{{ - 1.6 \times {{10}^{ - 19}}\;{\rm{C}}}}\\\\ = - 212\;{\rm{V}}\\\end{array}[/tex]

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the earth's escape speed (the speed you need to get away forever) is about 25,000 miles per hour. escape speed depends on the gravity of the object trying to hold the spacecraft from escaping. based on your understanding of gravity, how will the escape speed from the moon compare to the escape speed from earth?

### Answers

The **Moon's escape velocity** is less than the Earth's escape velocity.

We know that,

[tex]V_{e}[/tex]** = √ 2 G M / r **

where,

[tex]V_{e}[/tex] = Escape velocity

G = Universal gravitational constant

M = Mass of object

r = Radius of object

For the Moon,

G = 6.67 * [tex]10^{-11}[/tex] N m² / kg²

M = 7.35 * [tex]10^{22}[/tex] kg

r = 1737400 m

[tex]V_{e}[/tex] = √ [ 2 ( 6.67 * [tex]10^{-11}[/tex] * 7.35 * [tex]10^{22}[/tex] ) / 1737400 ]

[tex]V_{e}[/tex] = 2375.89 m / s = 5314.72 mil / hr.

**Escape speed** is the amount of speed required to escape the object's gravitational pull. The size or mass of the object trying to escape does not matter.

Therefore, the Moon's escape velocity is **less **than the Earth's escape velocity.

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Polar latitudes have a solar radiation deficit.

### Answers

Answer: TRUE

Explanation:

a rocket moves through outer space at 12,800 m/s. at this rate how much time would be required to travel the distance from earth to the moon, which is 380,000 km?

### Answers

The** time required **to travel the distance from earth to the moon, which is 380,000 km is 34545.45sec.

To find time

The** formula of speed **is speed = **distance/time**. To check out what the checks are for speed, you must to understand the units for distance and time.

As we know that

Speed = **distance/ time **

first, convert km into m of distance

then 380,000 km distance will be 380000000m.

putting the given values in the formula

12800 = 380000000 / time

The **time required** would be

34545.45 seconds.

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the circuit directory gives the " " in a wording that would be clear for "nonelectrical" people to decipher and identify the circuit number for luminaires, receptacles, appliances, or equipment.

### Answers

The **circuit directory** shows the load/area in a vocabulary that would be clear for "nonelectrical" people to decipher and determine the circuit number for luminaires, receptacles, appliances, or tools.

What is load divided by area?

**True stress** is the spread load divided by the actual cross-sectional scope of material.** Engineering strain** is the applied load separated by the original cross-sectional area of material. Also known as nominal stress.

What is area in stress formula?

As expected by the units, stress is assigned by dividing the force by the location of its generation, and since this area (“A”) is either sectional or axial, the** basic stress formula is “σ = F/A”**.

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A 51.0 kg boy is standing near the edge of a raft that is floating in a lake. The boy jumps horizontally off the raft with a velocity

of 3.50 m/s. The raft moves in the opposite direciton with a velocity of -7.70 m/s. What is the mass of the raft? Ignore the

resistance caused by the water on the raft.

### Answers

The boy jumps **horizontally **off the **raft **with a velocity of 3.50 m/s. The raft moves in the opposite direction with a velocity of -7.70 m/s.

**What is the difference between Mass and Raft?**

The Department of Housing and Community Development funds the RAFT Program, which prevents homelessness (DHCD). RAFT offers low-income families who are **homeless **or in danger of homelessness short-term financial support. This **force **is 67° north of east and has a **magnitude **of 15 N. Find the x and y components of the raft's **acceleration**, ignoring any water **resistance**. The **buoyant **force on the raft is equal to the weight of the water displaced according to Archimedes' principle.

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