A boulder released by a rockslide rolls 60 m in 4 s. What is its average speed?

While on a moving elevator during a certain perfod or time, Frank's apparent weight is 620 N. If Frank's mass is 70 kg, what is the magnitude and direction of Frank's acceleration?

Which is true according to the law of conservation of energy? A. in a closed system, the total amount of energy in the universe keeps on changing B. The supply of energy is limited, so it is essential to conserve it. C.

What is the wavelength in nm of a light whose first order bright band forms a diffraction angle of 19.0°, and the diffraction grating has 600.0 lines per mm?

While the negatively charged rod is near the disk without touching it, a hand briefly touches the end of the post. Then the negatively charged rod is removed. What would happen to the vane?

Why is it difficult to block light

How could you find out which wire is broken in a cable?

Which block has more thermal energy? if the blocks are placed in thermal contact, will the thermal engery of the blocks change?

What is long term potentiation

Which of the following describes a conductor? A. a rubber shoe sole with electrons stuck to the bottom. B. Electrons moving freely through a copper wire. C. a balloon with a small region of negatively charged electrons. D.

An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45 kg impala went into a deep crouch, pushed straight up for 0.21 s, and reached a height of 2.5 m above the ground.