Physics » Page 86

Macie Stephenson

Physics

What causes rainbows?

Answer Answers (2)

Physics

What is the most useful property of semi-metals

Answer Answers (1)

Physics

Which of the following is most likely to have a volume of 75 cm³?

A. a stereo system

B. a laptop computer

C. a portable mp3 player

D. a plasma screen television

Answer Answers (1)

Physics

What was Issac Newton's contribution to our understanding of the fundamental forces of the universe? (Gravity, electromagnetic, strong force, weak force)

Answer Answers (1)

Physics

Q1) A motor has a rating power of 20 W and motor is used for 10 s. Calculate the

energy supplied to the motor,

Answer Answers (1)

Physics

Why can't the efficiency of a heat engine be 100%?

Answer Answers (1)

Physics

Humans obtain energy in a number of different ways. About half of the electrical energy in the U. S. is generated by burning coal, largely because coal is very inexpensive. But some electrical energy is generated by capturing sunlight with solar panels.

Which of these is a reason why many people want to use more solar panels and less coal?

A.

Coal is a renewable resource, while sunlight is a nonrenewable resource.

B.

Coal is more abundant than sunlight.

C.

Burning coal tends to harm the environment more than using solar panels.

D.

Coal energy is cleaner than solar energy.

Answer Answers (1)

Aiyana Wilkerson

Physics

What would happen if an automobile moving at a high speed suddenly comes to a stop? How does this relate to Newton's laws and what factors could change the effect of the sudden stop on the passengers?

Answer Answers (1)

Physics

Work is done on a ball when a soccer player kicks it. Is the player still doing work on the ball as it rolls across the ground? Explain

Answer Answers (1)

Physics

Which objects in space formed from the huge disk cisce and debris beyond the outer planets? Select two option

Pluto

comels

Neptune

a solar nebula

planetesimals

Answer Answers (1)

Physics

Which type (s) of rock is (are) made from previously existing rock?

Answer Answers (1)

Physics

Could an average star, such as our sun, become a neutron star?

Answer Answers (1)

Jovany Castillo

Physics

Which statement best compares momentum and kinetic energy?

A. Both momentum and kinetic energy are vector quantities.

B. Momentum is a vector quantity and kinetic energy is a scalar quantity.

C. Kinetic energy is a vector quantity and momentum is a scalar quantity.

D. Both momentum and kinetic energy are scalar quantities.

Answer Answers (2)

Physics

Which best contrasts an electric generator and an electric motor?

Answer Answers (1)

Physics

1pt A ball with mass (m) is dropped from a certain height. Which equality could be rearranged to find the velocity of the

ball after it has fallen through a certain distance?

A. (1/2) mv2 = mgah

B. (1/2) mv2 = (1/2) kx2

c. 1/2mv2 = kq1q2/r

D. mgAh = (1/2) kx2

Answer Answers (2)