2. What is the speed of a car that travels 73.4 kilometers (km) in 5 hours?
Need an answer ASAP!!!

Answer:

2.5 m/s north

Explanation:

I took the test

Answer:

\(2km\)

Explanation:

\(1,000 m=1 km\)

So if you have \(2,000m\), there will be \(1km\) per \(1,000m\).

Therefore:

\(2000m=2km\)

Answer:

The phases are the first and third quarters.

Explanation:

During the first quarter of the moon phases, the line between Earth and the Sun is at a right angle to the line between Earth and the moon. At this time the moon has completed the first quarter of its orbit around the earth. At this point, half of the moon is fully reflecting light from the sun.

Also during the third quarter which is the last quarter, the line between the earth and the sun is at a right angle to the line between the earth and the moon. This is the time when the second half of the moon which was not illuminated during the first quarter becomes completely illuminated.

Since unbalanced forces acts on the spheres, the aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.

An experiment is a study whose objective is to study cause and effect relationships. In this case, the students had to increase the distance at which the spheres was released.

The aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.

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The rate of increase of the radius of the balloon is  0.12 cm/ sec.

The surface area of a strong object is a degree of the entire vicinity that the floor of the item occupies. The surface area is the general place at the floor of a 3-dimensional shape. To discover the floor location of a cuboid that has 6 square faces, upload the regions of all 6 faces. O

The volume of a sphere is 4/3πr^3

The rate of volume of the balloon is 24πcm^3/s

∴ the radius of the sphere at the volume of 24πcm^3= 4/3πr^3

dividing both sides by π

24= 4/3πr^3

multiply both side by 3/4

r^3 = 24×3/4

r^3= 18

r= √18

r= 2.62cm

∴ the rate of change in radius here is 2.62cm/s since π is constant.

The surface area of the sphere= 4πr^2

the surface area of the balloon is 30πcm^2

therefore 30π= 4πr^2

divide both sides by 4π

r^2= 30/4

r^2= 7.5

r=√7.5

r= 2.74cm

The rate of change in radius here is 2.74cm/s

Hence, the increase in the rate of change of radius is 2.74cm/s - 2.62 cm/s= 0.12cm/s

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The microwave used to heat your food and the cell phones you use are part of the electromagnetic spectrum. The electromagnetic spectrum is a range of all types of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Each type of radiation has a specific wavelength and frequency, determining its energy and application.

Microwaves, which have longer wavelengths and lower frequencies compared to visible light, are used in microwave ovens for heating food. They work by inducing polar molecules, such as water, in the food to rotate, generating heat through friction.

Cell phones, on the other hand, utilize radio waves for communication. Radio waves have even longer wavelengths and lower frequencies than microwaves. Cell phones send and receive signals through antennas by transmitting and detecting radio waves, allowing us to stay connected with others.

Both microwaves and cell phones are examples of everyday technologies that harness the properties of the electromagnetic spectrum to perform essential functions. While they differ in their specific applications, they both showcase the versatility and importance of understanding electromagnetic radiation.

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Given,

The force applied by each person who is pushing the object, F=50 N

The frictional force, f=20 N

The frictional force is the force that opposes the motion of the object. As the people are pushing the object to the right, the frictional force will be directed to the left. And as the force with which people are pushing is greater than the frictional force, the net force will also be directed towards the right.

The net force is given by,

On substituting the known values,

Therefore the net force on the object is 80 N to the right.

Thus the correct answer is option 4.

Answer:

D. 1×10⁻⁸ M

Explanation:

[H⁺] [OH⁻] = 10⁻¹⁴

(1×10⁻⁶) [OH⁻] = 10⁻¹⁴

[OH⁻] = 1×10⁻⁸

The concentration of hydroxyl ion will be  \(10^{-8}\)M.

The amount of a chemical substance in a mixture is expressed by the substance's concentration.

Calculation of concentration.

Given data:

Concentration of H+ =  1 x \(10^{-6}\) M.

It is known that,

[\(H^{+}\)][\(OH^{-}\)] = \(10^{-14}\)M

Now, put the value of concentration of [\(H^{+}\)] in above equation.

[1× \(10^{-6}\)][\(OH^{-}\)] =  \(10^{-14}\)M

[\(OH^{-}\)]  =   \(10^{-14}\) / [1× \(10^{-6}\)]M

[\(OH^{-}\)]  = \(10^{-8}\)M

Therefore, the concentration of hydroxyl ion will be  \(10^{-8}\)M.

Hence, the correct answer will be an option (D).

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Answer:

b. between 2 s and 4 s

Explanation:

2-4 was both 3m/s

The magnitude of the electrostatic force on sphere B due to sphere A is also 2.4 N, because the forces are equal in magnitude but opposite in direction as they form an action-reaction pair.

First by Coulomb's Law, the electrostatic force F between two point charges Q1 and Q2, separated by a distance r, is given by

F = k * (Q1 * Q2) / r^2

Where k is the Coulomb constant, which has a value of 9 × 10^9 N·m^2/C^2.

In this case, we have two spheres A and B, with charges +2 * 10^-6 C and +1 * 10^-6 C, respectively. The electrostatic force on A due to B is given as 2.4 N.

To find the electrostatic force on B due to A, we can use Coulomb's Law and the fact that the force between the two spheres is an action-reaction pair, meaning that the forces on A and B are equal in magnitude but opposite in direction. Therefore, the magnitude of the electrostatic force on B due to A is also 2.4 N.

We can see this by rearranging Coulomb's Law as:

F = k * (Q1 * Q2) / r^2

=> Q2 = (F * r^2) / (k * Q1)

where

Substituting the values given, we get:

Q2 = (2.4 N * (1 m)^2) / (9 × 10^9 N·m^2/C^2 * 2 × 10^-6 C) = 0.133 C

Therefore, the magnitude of the electrostatic force on sphere B due to sphere A is also 2.4 N, because the forces are equal in magnitude but opposite in direction as they form an action-reaction pair.

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Answer:

a. Aim of the experiment: To identify the magnetic fields around the bar magnet.

b. After tapping the paper, the iron filings align themselves according to the lines of the magnetic force of bar magnet. The magnetic field is more concentrated at the ends of poles as most of the iron fillings are attracted at the poles and the pattern form by iron filling shows the magnetic field of the bar magnet.

c. If iron filings will be replaced with grit, there will be no magnetic movement around bar magnet as grit is not a metal and do not have any magnetic properties.

Explanation:

a) The experiment with paper, iron sprinkles and bar magnet was performed to show the presence of the magnetic field around the magnet.

o) In the experiment, when we placed two opposite poles and sprinkled the iron over, the iron filings were aligned between forces applied by the opposite poles that are they attract each other. When the same poles were placed facing each other, the iron sprinkles were arranged away from each other. This shows that opposite poles attract each other while the same poles repel each other.

c) If iron filings were replaced with the grit, the magnetic field will be stronger.

Answer:

position speed and direction

Explanation:

hope that helps =)

also i love your profile pic i love fnaf myself!!!!

Answer:

gravity

Explanation:

Even when satellites are thousands of miles away, Earth's gravity still tugs on them. Gravity—combined with the satellite's momentum from its launch into space—cause the satellite to go into orbit above Earth, instead of falling back down to the ground.

The sprinter's changing speed, as well as the speed of any other moving object or person, is displayed on a velocity-time graph. The slope of the graph line on a velocity-time graph is used to represent acceleration.

Velocity's rate of change with time, both in terms of speed and direction. A point or object going straight ahead is accelerated when it accelerates or decelerates. m/s2 is the unit of acceleration. The term "constant acceleration" refers to the pace at which a particle's velocity changes.

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Answer:

The correction is the state of mind being for the Fahrenheit that is calculator from anarchy

Explanation:

Answer:

Si system is :kilo miligram kelvin

us system is: Fahrenheit Ounce yard inch

Explanation:

Answer:

I think it's false I am not that sure

Answer:

It is False.

Explanation:

Correct

3.

True or false. The greater the distance that the plane moves from an object, the lower the force that will be applied when the action is taken.

True

Correct

False

False. The greater the distance that the plane moves from an object, the greater the force that will be applied when the action is taken.

1

Points

/ 1

Answer

In the parallel circuit, you have to position the switch on only one of the loops.

The height of the ball will rise after the bounce is 10 m by using the energy conserved.

Law of conservation of energy states that, in the closed system the energy remains constant in the system and its surroundings. It states that the energy can neither be created nor destroyed and the energy is transformed from one system to another.

From the given, When the ball rises up to a certain height, the kinetic energy is converted into potential energy, and hence the energy is conserved.

The total energy is conserved,

Energy = potential energy + Kinetic energy = constant

Kinetic energy = potential energy

1/2 (mv)² = mgh (Kinetic and potential energy, mass remains same).

speed of the ball (u) = 14.1 m/s

height of the ball=?

acceleration due to gravity, g = 9.8 m/s²

h = 14.1×14.1 / (2×9.8)

 = 9.9 m

Thus, the height of the ball is 10 m.

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Answer:

Earth is the only known planet to have bodies of liquid water on its surface. Europa is thought to have subsurface liquid water. ... Evidence points to water on other planets in our solar system. In 2015, NASA confirmed that liquid water flows intermittently on present-day Mars

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The new orbital speed after friction from the Earth's upper atmosphere has done -7.5x\(10^{9}\) J of work on the satellite is approximately 7489 m/s.

We can use the work-energy principle to solve this problem. The work done by the atmosphere is equal to the change in kinetic energy of the satellite

W = ΔK

Where W is the work done by the atmosphere and ΔK is the change in kinetic energy. We can find the initial kinetic energy of the satellite using the formula

K = (1/2)m\(V^{2}\)

Where m is the mass of the satellite and V is its initial velocity.

Since the problem does not provide the mass of the satellite, we can assume it is constant and cancel it out in the equations. Thus, we can write

W = ΔK = (1/2)m\(Vf^{2}\) - (1/2) m\(Vi^{2}\)

Where Vf is the final velocity of the satellite and Vi is its initial velocity.

Substituting the given values, we have

-7.5x\(10^{9}\) J = (1/2)m\(Vf^{2}\) - (1/2) m\(Vi^{2}\)

We also know that the initial orbital speed of the satellite is equal to the velocity required for circular motion at its altitude, which can be calculated using the formula

V = √(GM/r)

Where G is the gravitational constant, M is the mass of the Earth, and r is the distance between the satellite and the center of the Earth.

Substituting the given values, we have

Vi = √[(6.67x\(10^{-11}\)N\(m^{2\)/\(Kg^{2}\))(5.97x\(10^{24}\) kg)/(6.67x\(10^{6}\)m)] = 7646 m/s

Solving for the final velocity, we have

Vf = √[2(-7.5x\(10^{9}\) J)/(m) + \(Vi^{2}\)]

The mass of the satellite cancels out, and we get

Vf = √(2(-7.5x\(10^{9}\) J)/(\((7646m/s)^{2}\) + \((7646m/s)^{2}\) ) ≈ 7489 m/s

Therefore, the new orbital speed after friction from the Earth's upper atmosphere has done -7.5x\(10^{9}\) J of work on the satellite is approximately 7489 m/s.

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This question involves the concepts of average velocity and displacement.

The average velocity of the car is "60 mi/hr (north)".

The average velocity of a car can be defined as the rate of change of displacement of the car:

\(Average\ Velocity=\frac{Displacement}{Time}\\\\ Average\ Velocity=\frac{240\ mi\ (North)}{4\ hr}\)

Average Velocity = 60 mil/hr (North)

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Moving away from the source causes the observer to measure a lower frequency and higher wavelength.

The frequency of the detected sound from a stationary source will change as a result of the observer's movement. Moving away from the source causes the observer to measure a lower frequency and higher wavelength.

The Doppler effect is a shift in sound wave frequency that happens when the source of the sound waves is moving in relation to a listener who is stationary.

The wave propagates the sound energy throughout the medium, typically in all directions and with decreasing intensity as it gets further away from the source.

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For a given potential difference, a bigger resistance means a smaller current through a component.

Resistance in an electrical circuit is a measure of the opposition to the flow of electric current. It is measured in units of ohms (Ω) and is represented by the symbol R in electrical equations.

The amount of resistance in a circuit can affect the amount of current flowing through it and the voltage across it. In a simple circuit, resistance is primarily determined by the materials used in the circuit, such as the wires and the components.

In a more complex circuit, resistance can also be affected by the design of the circuit, including the number of components and the way they are connected. The resistance determines the current in the circuit.

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Answer:

Radio Waves

Explanation:

Radio wave is a type of electromagnetic radiation notorious for their use in technologies used for communication like air traffic control, mobile phones, televisions and remote-controlled toys. Radio waves have the longest wavelength in the electromagnetic spectrum and are easily transmitted through air.

A radar gun uses radio waves to tell how far away an object is. To do that, the radar tool emits a focused radio wave and listens for any echo. If there is an item, say a car within the route of the radio wave, it's going to replicate some of the electromagnetic energy, and the radio wave will return to the radar gun. Radio waves flow via the air at a steady pace, so the radar gun can calculate how far the object is based totally on how long it takes the radio signal to return.