PHYSICS MIDDLE SCHOOL

Explain why particles in a gas are free to move far away from each other.

Answers

Answer 1
Answer: The reason that particles of gas are able to move freely around is because most gases in themselves have week bonds to each other and even so with those bonds the gas has large amounts of energy to break those such bonds. Ex: When you boil water, what do you use to boil it? Heat, and heat is energy you add heat to the water energizing the water allowing the water to jump up and away form it turning it into gas, but since it is now gas and charged it has free roam.
Answer 2
Answer: The particles that are in the gas are packed loosely and has no definite shape or volume

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At which point will the riders experience centripetal acceleration?

Answers

the answer would be (X)

A group of students is measuring the change in momentum of an object. Which set of lab equipment would be most useful in measuring the momentum of an object?

Answers

Answer:

Ruler/tape and stopwatch

Weighing balance

Explanation:

Since for momentum, we're concerned with mainly mass and velocity of an object then you will need weighing balance calibrated with the most accurate unit (normally grams or kilograms). The weighing balance will therefore be useful in measuring mass. To obtain velocity, you need to get distance that an object moves and divide it by time taken for the movement. Therefore, a tape or rule will be useful in measuring distance moved in meters while stopwatch will help you get time taken which consequently you use to get velocity.

Thermal energy is transferred as heat from a warmer object to a cooler object until Select one: a. all of the energy from the hot object is transferred to the cold object. b. the temperature is the same in both objects. c. all of the energy from the cold object is transferred to the hot object. d. the thermal energy is converted into another type of energy such as light.

Answers

Answer: Option B

Explanation:

When the thermal energy is transferred from a hotter body to the colder body then the transfer of energy takes place until the temperature of both the objects are same.

The energy from the hotter body is transferred to the colder body. Example: The heat transfer from the hotter water takes place into the colder water.

The energy transfer will stop only when the temperature of both the water will be same.

I'm like 98% it's D.

Carla pushes a toy car and lets it go. The toy car rolls and gradually comes to a stop. What would make the car stop?A. A force must be applied to the car in the direction opposite to that in which it is moving.
B. A force must be applied pushing the car forward in the same direction as the moving car.
C. A force must be applied in a direction pushing the car upward to make the car stop.
D. A force must be applied in a direction pulling the car downward causing the car to stop.

Answers

A is correct :) If you push up or down on a toy car it won't nessicarily stop. If you push it in the same direction, it will probably go faster. If you push it in the opposite direction, it will stop. (Or go backwards depending on how hard you push)
A is correct because this creates friction so the car stops.

How is acceleration of the cart related to the amount of force acting on it? the strips of it?

Answers

We know that Newton's Second Law of Motion states that -

                                        F = ma

It is clear that acceleration is directly proportional to the Force acting on a body. So, the amount of Force acting on a body is directly proportional to the acceleration, when the mass is constant.
Force on the cart is directly proportional to the acceleration.

This relationship was given be Sir Isaac Newton.

Mathematically ;

F = ma

Where F is force, a is acceleration and m is constant of proportionality , also known as mass.

Since the early 1990s, geneticists have produced____________ crops that yield fruits and vegetables commonly found in U.S. supermarkets.

Answers

Since the early 1990s, geneticists have produced "genetically modified" crops that yield fruits and vegetables commonly found in U.S. supermarkets. Genetically modified plants (and also applicable to animals) in agriculture are those plants whose DNA are being modified using genetic engineering techniques.

B, Genetically modified.
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