PHYSICS HIGH SCHOOL

A kilowatt-hour (kW-h) must be a unit of _____.A. mass
B. force
C. power
D. energy

Answers

Answer 1
Answer: Since Kilowatt-hours are based upon Joules, the answer is Energy. (One watt is one joule per second) 

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Do you know which component of the Star Wars movies is possible according to our current understanding of physics?

Answers

Although Star Wars have been purely fictional and concerns space travel and Physics, it has some components that is possible according to our current understanding of Physics. Take for example the TIE fighters spacecrafts. It stands for Twin Ion Engine. Currently, Ion engines are being used for actual flight. 

A container filled with gas has a volume of 185 mL and a pressure of 310 mm Hg. The desired new volume is 74.0 mL. What is the required new pressure? 124 mm Hg 44 mm Hg 775 mm Hg 0.00129 mm Hg

Answers

The answer is 124 mm hg

Which of these statements is true? A.
Some molecules may contain no atoms.


B.
Some elements found in nature exist as molecules.


C.
Some compounds include only one type of element.


D.
Some atoms are made of two or more different elements.

Answers

B). Some elements found in nature exist as molecules. 
That is, their atoms travel around in bound pairs. 
Examples are Hydrogen, Oxygen, and Nitrogen.

A). No.  Without atoms, you can't make a molecule.

C). No.  A compound is a chemical combination of two or more elements.

D). No.  An atom is the smallest unit of ONE single element.

Hello, your answer is, C. Some compounds include only one type of element.

I hope it helped!

Luke Autbeloe drops an approximately 5.0 kg object (weight = 50.0 N) off the roof of his house into the swimming pool below. Upon encountering the pool, the object encounters a 50.0 N upward resistance force (assumed to be constant). Use this description to answer the following questions. (Down is usually considered a negative direction) a. Which one of the velocity-time graphs best describes the motion of the object? Why?

Answers

The motion of the object is best depicted by graph B. Therefore, option B is correct.

This is because the object is initially accelerating downwards due to the force of gravity. However, when it encounters the pool, the upward resistance force counteracts the force of gravity, and the object's velocity slows down. The object will eventually reach a terminal velocity, where the upward resistance force is equal to the force of gravity, and the object will no longer accelerate.

Graph A shows a constant velocity, which is not possible in this case. Graph C shows an initial acceleration downwards, followed by an acceleration upwards. This is also not possible, as the object cannot accelerate upwards while it is still in contact with the pool. Graph D shows a constant acceleration downwards.

Learn more about motion, here:

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Graph B represents correct graph for velocity time Explanation:Initially the object is dropped under the influence of constant force due to gravitySo here we can say its acceleration is constant due to gravityhence here the velocity will increase downwards due to gravity and it is given asnow when it enters into the pool an upward force of same magnitude will act on itso net force on it is so here we will have no acceleration and it will move with constant speed after that so here correct graph is Graph B

An blank
Used to determine the change of an object

Answers

The acceleration is used to determine the change of an object.

Who is the president of kenya​

Answers

Question:

Who is the president of Kenya?

Answer:

Uhuru Kenyatta

Answer:

Uhuru Muigai Kenyatta

Explanation:

He was born on 26 October 1961.

He is a Kenyan politician, businessman, and the fourth and current President of the Republic of Kenya.
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When object A collides with object B and bounces back, its final momentum is ____ its initial momentum.a. greater than c. in the same direction as b. less than d. in the opposite direction of