PHYSICS MIDDLE SCHOOL

Who created E = mc2?
(What is it)?

Answers

Answer 1
Answer:

Albert Einstein created this equation. It means that the formula E= mc^(2) shows that mass can be converted into energy, and energy can be converted into mass. Einstein made this equation 100+ years ago, and yes, he was right with the theory.

(Mark this as the brainliest if this answer helps!)

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A car is strapped to a rocket (combined mass = 661 kg), and its kinetic energy is 66,120 J.At this time, the rocket runs out of fuel and turns off, and the car deploys a parachute to slow down, and the parachute performs 36,733 J of work on the car.What is the final speed of the car after this work is performed?

need help with the ones that have numbers on the sides.#1 #2 #3 #4 please help.i will pick fair brainliest answer

Answers

1. Some stars are bigger than others, some are different colors or temperatures. It all really depends on the age of the star.

2. Four differences could be:

   1) Outer planets are much farther away from the sun, so they get less sunlight than inner planets.
   2) Also, the outer planets are all gas giants (excluding Pluto), while inner planets are all rocky planets.
   3) Inner planets also have a much higher density than outer planets.
   4) Outer planets also tend to have many more moons than inner planets (such as Jupiter, with 63 known moons).

3. The barrier that separates the inner from the outer planets is a ring of space rocks known as the Asteroid Belt.

A comet is a ball of ice that orbits a star in a wide elliptical orbit.
An asteroid is a large rocky body that orbits a star, and could be anywhere in size from 600 miles across to tiny dust particles.
A meteoroid is a small object floating through space freely (not necessarily bound in any orbit) that is usually made of a rocky or metallic material.

4. Day and night are caused by the earth's rotation on its axis. Night is relative to the observer, and occurs when the observer is on the side opposite that on which the sun is shining.

Hope that helped =)
1.Difrences are color,size and the amount of light it gives off 2. 1.inner planets are warmer 2.inner planets are closer to the sun 3.Outer planets are balls of gass 4.outer planets bigger 3.an astroid belt A comet is a tail of gas and dust particles An asteroid is a large rock A meteoroid is lumps of rocks that orbit the sun 4.The rotation of the earth on its axis

What does an electromagnet have that a bar magnet does not ?

Answers

The bar magnet and the electromagnet act identical. The difference being a electromagnet is a coil of wire that has a power source connect to both ends, this energizes the coil with an electromagnetic field.

Acceleration is defined as the rate of change for which of the followingA. time
B. velocity
C. position
D. displacement

Answers

Acceleration is defined as the rate of change in the velocity of the moving object, therefore the correct answer is option B.

What is acceleration?

The rate of change of the velocity with respect to time is known as the acceleration of the object.

The rate of change of displacement is known as the velocity of the moving body and it is given by the expression,

velocity = d(displacement)/dt

The rate of change of velocity is known as the acceleration of the moving body and it is given by the expression,

acceleration = d(Velocity)/DT

Thus, acceleration is defined as the rate of change in the velocity of the moving object, therefore the correct answer is option B.

To learn more about acceleration from here, refer to the link;

brainly.com/question/2303856

#SPJ6

The acceleration of the body is defined as the rate of change of velocity.

Further Explanation:

The body is said to be accelerating its velocity is changing with the time. The velocity of a particular body is defined as the rate of change of displacement of the body.

The velocity of a body is represented as:

v=\frac{{dx}}{{dt}}

Here, x  is the position of the body and t  is the time

Now when a body moves with a constant speed during its motion, then it is considered as the uniform motion of the body. During the uniform motion of the body, the acceleration of the body remains zero.

But if the velocity of the body is changing along with the time, the body is said to be accelerating. The acceleration of the body is defined as the rate of change of velocity of the body. It is represented mathematically as:

\boxed{a=\frac{{dv}}{{dt}}}

Thus, the acceleration of the body is defined as the rate of change of velocity.

Learn More:

1. If an object is moving at a constant speed in one direction, what is needed to change its speed or direction brainly.com/question/1979936

2. A car traveling at speed v takes distance d to stop after the brakes are applied brainly.com/question/4967602

3. Suppose you are standing on a train accelerating at 0.20 g brainly.com/question/1621778

Answer Details:

Grade: Middle School

Subject: Physics

Chapter: Kinematics

Keywords:

Acceleration, rate of change, velocity, time, position, displacement, constant speed, accelerating, v=dx/dt, a=dv/dt, rate of change of displacement.

How are the frequency and wavelength of electromagnetic waves related?

Answers

The frequency of electromagnetic wave is inversely proportional to the wavelength of the wave.

The speed of a wave is directly proportional to the wavelength of the wave.

v = fλ

where;

  • v is the speed of the wave
  • f is the frequency of the wave
  • λ is the wavelength

The frequency and wavelength of electromagnetic waves is related by the following equation as shown below;

v = f \lambda \n\nf= (v)/(\lambda)

Thus, we can conclude that the frequency of electromagnetic wave is inversely proportional to the wavelength of the wave.

Learn more here:brainly.com/question/19337414
Wavelength is the distance between two peaks of a wave and is usually measured in meters.  Frequency refers to the number of cycles a wave must produce to pass a point of origin in a second. Frequency is usually measured in Hertz.

Which body system remove carbon dioxide and waste

Answers

The excretory system
Respiratory System bring oxygen into your body and  remove carbon dioxide waste. 

Which has more Potential Energy a car parked on the top of the hill,a person on the top of the same hill sitting down eating a sandwich, or a man running fast at the bottom of the same hill?

Answers

As long as you're talking about gravitational potential energy the car at the top of the hill is correct. If you're talking about chemical potential energy, it would depend on how much gas is in the tank and what the contents of the sandwich were.
A car parked in top of the hill I hope this helps
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