The starting position is 0m. The starting velocity is 30m/s. Time is given as 2.5s. What is the final position of the object?

Answer:

3504.4 kgm/s

Explanation:

First, convert km/hr to m/s:

19 km/hr x 1000m/1km x 1/60min x 1/60s = 5.28 m/s

p = mv

p = (664 kg)(5.28 m/s) = 3504.4 kgm/s

Answer: 0.24 atm

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.  

The equation given by this law is:

\(P_1V_1=P_2V_2\)

where,

\(P_1\) = initial pressure of gas = 1.0 atm

\(V_1\) =  initial volume of gas = \(0.80 m^3\)

\(P_2\) = final pressure of gas= ?

\(V_2\) = final volume of gas = \(3.32m^3\)

Putting values in above equation, we get:

\(1.0\times 0.80m^3=P_2\times 3.32m^3\)

\(P_2=0.24atm\)

Thus the atmospheric pressure of the gas is 0.24 atm

The average velocity of that driver is 58 mi/h.

As per data given:

first velocity (V1) = 60 mi/h

first distance (s1) = 100 miles

second velocity (V2) = 55 mi/h

second distance (s2) = 50 miles

First, we have to find the time spend that driven in first 100 miles by calculate it as follow:

V1 = s1 : t1

60 = 100 : t1

t1 = \(\frac{10}{6}\) h

Then calculate the second condition in 50 miles:

V2 = s2 : t2

55 = 50 : t2

t2 = \(\frac{10}{11}\) h

then calculate the average velocity:

Average velocity = total distance / total time

Average velocity = 150 : (\(\frac{10}{6}\) +   \(\frac{10}{11}\) )

Average velocity = 58.2352941176

Let round the value to 58 mi/h. Hence, the average velocity of the driver is 58 mi/h

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The container that would have the least volume is container B.

Evaporation is the process by which a liquid changes into a vapor (a gaseous state) due to the conversion of its surface molecules to a gaseous state.

This occurs when the energy of the liquid's surface molecules exceeds the energy required for the molecules to escape from the liquid's surface into the air as a vapor.

The rate of evaporation is influenced by several factors, including temperature, wind speed, humidity, and the surface area of the liquid. For example, increasing the temperature of a liquid or exposing more of its surface area to the air will increase the rate of evaporation.

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Answer:

B

Explanation:

We have that Since Cart A spends t=77.5secs and Cart B spends t=50sec

Therefore

The Cart A wins the Race and by 25.5( 77.7-50)secs

From the question we are told

For Cart A

Generally the equation for the Velocity  is mathematically given as

\(v=\frac{d}{t}\\\\t=\frac{d}{v}\\\\t=\frac{1000}{20}\\\\t=50sec\)

For Cart B

Generally the Newtons equation for the Motion  is mathematically given as

\(S=ut+1/2at^2\\\\Therefore\\\\S=ut+1/2at^2\\\\1000=0+1/2*(0.33)t^2\\\\t=\frac{1000}{1/2*(0.33}}\\\\t=77.5secs\)

Since

Cart A spends t=77.5secs and Cart B spends t=50sec

Therefore

The Cart A wins the Race and by 25.5( 77.7-50)secs

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Answer:

Only the goalie is allowed inside the goal crease. The only exception when another player is allowed in the goal area is when they take off from outside the goal area, and shoots or passes the ball before landing. To avoid interference with other players, the player must then exit the goal area as soon as possible.

Explanation:

Answer:

When r1 – r2 equal the wavelength of the monochromatic light

Explanation:

This is because to observe a bright fringe a constructive interference pattern of path difference, r1 – r2 = mλ is observed, where m is an integer and λ = wavelength of monochromatic light.

For bright fringes and thus constructive interference, r1 – r2 must be integral multiples of the wavelength, λ. When r1 – r2 , we have the central bright fringe and thus m = 0.

The first order bright fringe which is adjacent to the central bright fringe is obtained when m = 1,

So r1 – r2 = 1 × λ

r1 – r2 = λ

Thus, the path difference required to produce the first order bright fringe that is adjacent to the central bright fringe is when r1 – r2 = λ, the wavelength of the monochromatic light.

Answer:

1

Explanation:

Answer:

The angle between the incoming light

and the normal

Answer:

Sample Response: They are used to transmit data, TV signals, and telephone signals. They are also used in ovens and radar.

Explanation:

Answer:

Wire them in parallel   ( rather than in series)

Explanation:

If you wire them in parallel they will have same voltage applied

The speed at the level of the lowest position is 5.01m/s.

Energy cannot be created or destroyed; it can only be changed from one form of energy to another, according to the law of conservation of energy. This implies that a system always has the same amount of energy, barring external energy addition.

To reduce expenses and protect the resources for future use, energy conservation is necessary. The environment is contaminated by the harmful gases released into the atmosphere by conventional energy sources. Traditional energy sources are finite and could run out one day.

This is a typical energy conservation question, Set the kinetic energy at the bottom and the potential energy at the height to be equal.

mgh = 1/2mv²

gh = v²/2

v = √2gh

v = √2×9.8×1.28m/s

v = 5.01m/s.

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When you view a clock in a mirror, the hands appear to rotate counterclockwise.

This is because mirrors reverse the orientation of the image they reflect. For example, if you hold up a sign with the word "STOP" written on it, when you view it in a mirror, it will appear backwards, with the "S" on the right and the "P" on the left.

In the case of a clock, the hands are oriented in a clockwise direction when viewed from the front. However, when you view the clock's reflection in a mirror, the image is reversed, so the hands appear to move in the opposite direction - counterclockwise.

It's worth noting that this effect only occurs with analog clocks, which have physical hands that move around the clock face. Digital clocks, which use numerical displays, do not exhibit this reversal because there are no physical objects moving in a specific direction to be reflected.

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When a tree is planted in an orchard, the tree's height increases by 8% every year. The height of the tree is 78 cm when it is planted.

The correct formula that can be used to calculate the height of the tree years after planting is:

\(h = 78(1.08)^t\)

where "h" represents the height of the tree after "t" years of planting, and 1.08 is the growth factor that takes into account the 8 percent increase in height each year.

To use the formula, simply substitute the value of "t" with the number of years since planting, and then evaluate the expression to get the height of the tree in centimeters. For example, after 5 years, the height of the tree would be:

\(h = 78(1.08)^5\)

h = 114.60 cm

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car starts from rest and travels for 5.0 s with a constant acceleration of +1.5 m/s^2.

The car's speed was 1.2 m/s faster at the end of the breaking period.

From Equation of the motion

v = u + at

car starts from rest and travels for 5.0 s with a constant acceleration of +1.5 m/s^2

v = 0+ 1.5 * 5 = 7.5 m/s

a constant acceleration of -2.1m/s^2. The brakes are applied for 3 seconds

Then

u= 7.5 m/s  t= 3s a= -2.1 m/s^2

v= 7.5 + -2.1 * 3 = 7.5 -6.3 = 1.2 m/s

The car's speed was 1.2 m/s faster at the end of the breaking period .

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Answer: ask god in your prayers

Explanation: im here for the same reason you are

I DONT KNOW THE ANSWER

Answer:

The semi-truck will stop after the car.

Explanation:

It will do that because the semi-truck has more mass than the car.

a) The planar density expression for FCC (100) is 4/a^2.

    The planar density expression for FCC (111) is 2 / [(sqrt(3) / 2) * a^2].

b)  The planar density for the FCC (100) plane is 24.63 atoms/nm^2.

    The planar density for the FCC (111) plane is  12.32  atoms/nm^2.

a) To derive the planar density expression for the FCC (100) and (111) directions in terms of the atomic radius R, we need to consider the arrangement of atoms in these planes.

FCC (100) Plane:

In the FCC crystal structure, there are 4 atoms per unit cell. The (100) plane cuts through the middle of the unit cell, passing through the centers of the atoms at the corners. Since the atoms at the corners are shared with adjacent unit cells, we only count a fraction of these atoms.

For the (100) plane, we have 2 atoms in the plane, located at the corners of the square, and 1/2 atom at each of the 4 face centers. Thus, the total number of atoms in the plane is 2 + (1/2) * 4 = 4 atoms.

The area of the (100) plane is determined by the square formed by the lattice vectors a and a, which gives an area of a^2.

The planar density (PD) is defined as the number of atoms per unit area, so we divide the total number of atoms (4) by the area (a^2):

PD(100) = 4/a^2

FCC (111) Plane:

In the FCC crystal structure, there are 4 atoms per unit cell. The (111) plane passes through the centers of the atoms at the corners and the center of the face. Similarly to the (100) plane, we need to account for the fraction of shared atoms.

For the (111) plane, we have 1 atom in the plane, located at the corner of the equilateral triangle, and 1/3 atom at each of the 3 face centers. Thus, the total number of atoms in the plane is 1 + (1/3) * 3 = 2 atoms.

The area of the (111) plane is determined by the equilateral triangle formed by the lattice vectors a, a, and a, which gives an area of (sqrt(3) / 2) * a^2.

The planar density (PD) is defined as the number of atoms per unit area, so we divide the total number of atoms (2) by the area ((sqrt(3) / 2) * a^2):

PD(111) = 2 / [(sqrt(3) / 2) * a^2]

b) Now, let's compute the planar density values for the FCC (100) and (111) planes using the atomic radius R = 0.143 nm for Aluminum.

For FCC (100) plane:

PD(100) = 4 / a^2

For Aluminum, the lattice constant a is related to the atomic radius R by the formula:

a = 4R / sqrt(2)

Substituting the given value of R = 0.143 nm:

a = 4 * 0.143 nm / sqrt(2) ≈ 0.404 nm

Therefore, the planar density for the FCC (100) plane is:

PD(100) = 4 / (0.404 nm)^2 ≈ 24.63 atoms/nm^2

For FCC (111) plane:

PD(111) = 2 / [(sqrt(3) / 2) * a^2]

Using the calculated value of a = 0.404 nm:

PD(111) = 2 / [(sqrt(3) / 2) * (0.404 nm)^2] ≈ 12.32 atoms/nm^2

Therefore, the planar density for the FCC (111) plane is approximately 12.32 atoms/nm^2

Thus,

a) The planar density expression for FCC (100) is 4/a^2.

    The planar density expression for FCC (111) is 2 / [(sqrt(3) / 2) * a^2].

b)  The planar density for the FCC (100) plane is 24.63 atoms/nm^2.

    The planar density for the FCC (111) plane is  12.32  atoms/nm^2.

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Answer:

Explanation:

Three screens are placed one behind the other and light falls on all of them from a torch . In this case a mirror can be only the last screen . In case of first or second screen being a mirror , light would not have reached the last screen because the nature of mirror is to reflect the light back.

Hence , the only possibility is that , the last screen is mirror.

Answer:

h = 1/2gt^2

Is the formula for the height of a free falling object.

Put in the numbers:

h = 1/2*9.8 (gravitational constant) * 10^2

h=490 meters.

Please note that the gravitational constant is approximate, you could also use a more specific value or 10

The missing value in the table is the wavelength of the sound wave, which is calculated to be 6.3 meters using the formula wavelength = wave speed / frequency. so, the correct option is A).

The given problem provides the speed and frequency of a sound wave and asks to find the missing value of the wavelength.

Using the formula for wavelength,

λ = v/f

In this case, the frequency was 55Hz and the speed of the wave was 346m/s.

λ = 346 m/s / 55 Hz

λ = 6.3 m

the missing value was calculated to be 6.3 meters. The wavelength is the distance between adjacent crests or troughs of a wave and is the reciprocal of the frequency. so, the correct answer is A).

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--The given question is incomplete, the complete question is given

" A sound wave generated by musical note has the characteristics presented in the table. What is the missing value

A 6.3

B 4.7

C 7.5

D 5.6 "--

The correct statement is: "Newton's second law states that force equals mass times acceleration."

Newton's second law of motion is commonly expressed as F = ma, where F represents the force acting on an object, m represents the mass of the object, and a represents the acceleration experienced by the object. According to this law, the force acting on an object is directly proportional to its mass and the acceleration it undergoes. The product of mass and acceleration gives the force exerted on the object.

So, the correct answer is "force equals mass times acceleration."

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The speed of the plane after traveling the given distance is 60 m/s.

Given the following data:

To determine the speed of the plane after traveling the given distance, we would use the third equation of motion;

\(V^2 = U^2 + 2aS\)

Where:

Substituting the given parameters into the formula, we have:

\(V^2 = 0^2 + 2(3)(600)\\\\V^2 = 3600\\\\V=\sqrt{3600}\)

Speed, V = 60 m/s

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A force of 680 N is required to get the clock moving, so the maximum static friction is also f ˢ = 680 N. The clock is at rest, so the net vertical force acting on it is 0, and by Newton's second law,

n - mg = 0

where

n = magnitude of the normal force

m = 85 kg = mass of the clock

g = 9.8 m/s² = magnitude of the acceleration due to gravity

So we have

n = mg = (85 kg) (9.8 m/s²) = 833 N

which means the static friction f ˢ is such that

f ˢ = µ ˢ n

Solving for the coefficient of static friction gives

µ ˢ = (680 N) / (833 N) ≈ 0.82

After it starts moving, a force of 540 N is required to keep the clock going at a constant speed, so the kinetic friction is also f ᵏ = 540 N. Then

f ᵏ = µ ᵏ n

and solving for the coefficient of kinetic friction yields

µ ᵏ = (540 N) / (833 N) ≈ 0.65

The estimated thickness of the Earth's atmosphere, the altitude at which a nitrogen molecule would stop traveling straight up, is approximately 22.4 km.

The maximum altitude that a molecule can reach is determined by the balance between the molecule's kinetic energy, which is proportional to the square of its velocity, and the potential energy due to gravity, which is proportional to the distance from the center of the Earth.

Using the equation for potential energy :

\(mgh = 1/2mv^2\\h = v^2/2g\\h = (670 m/s)^2 / (2 * 9.81 m/s^2) = 22.4 km\)

Therefore, the estimated thickness of the Earth's atmosphere, defined as the altitude at which a nitrogen molecule would stop traveling straight, is approximately 22.4 km.

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First electric circuit means, the circuit has elements like resistors, capacitors, and inductors along with sources. Any electric circuit comprises nodes, branches, and meshes.

The joining point of two elements is called a node. The element between two nodes is called a branch. In branch, only one series element is possible to connect but in parallel, it can have N number of elements. No branch without elements in electric circuits.

A resistor is an electrical aspect that limits or regulates the go with the flow of electrical modern-day in a digital circuit. Resistors can also be used to offer a selected voltage for an energetic device together with a transistor.

The resistor is described as. A passive electrical issue with two terminals that can be used for both limiting or regulating the glide of electric contemporary in electric circuits. the main cause of the resistor is to lessen the modern-day go with the flow and to lower the voltage in any unique part of the circuit.

A resistor works by using proscribing the float of current, it may try this in one in all 3 approaches: first off, by using a much less conductive cloth, secondly by making the conductive fabric thinner, and sooner or later by making the conductive fabric longer.

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Answer:

Biosphere

Explanation:

Plants release the biosphere into the atmostphere. :)

Answer:

3,033,276 J

Explanation:

The work can be calculated as

W = Fd

Where F is the force and d is the distance.

Replacing F by 29,738 N and d by 102 m, we get:

W = (29,738 N)(102 m)

W = 3,033,276 J

Then, it has done 3,033,276 J

7.11 meters

Explanation

to solve this we need to use this formula:

Step 1

Let

now,replace and calculate

therefore, the answer is

7.11 meters

I hope this helps you