A rock rolls down a steep hill. it's initial velocity is 1 meter per second. by the time it reaches the bottom of the hill 30 seconds later, it's velocity is 7 meters per second. what is the acceleration of the rock?

Rahul goes to school daily on his cycle. It is his daily observation that he needs to apply more force to start the cycle to move, as compared to when the cycle is in motion. Explain.

A deli owner creates a lunch special display board by taking a uniform board which has a weight of 217 n, cutting it in half, hinging the halves together with a frictionless hinge, and setting it up as an inverted "v".

Why is tin foil or aluminum foil a good insulator?

How does the resulting cell at the end of asexual reproduction compare to the original cell from the beginning of asexual reproduction? 2. What happens during interphase that allows the two resulting cells to be the same as the original cell? 3.

A square plate has an area of 29.00 cm2 at 20.0? C. It will be used in a low temperature experiment at T = 10.0 K where it must have an area of 28.00 cm2. What area must be removed form the plate at 20.0 °C for it to have the correct area at 10.

Is it possible to get a bruise inside your body?

he Period refers to the time it takes an individual particle (or coil) to complete one back and forth vibration about its fixed position. Contrast a low period set of continuous vibrations with a high period set of continuous vibrations.

The velocity - time graph of a ball of mass 25g moving on road is as given below: (a) How much force does the road exert on the ball to bring it to rest? (b) What is the direction of the force exerted by the road?

An explosion that destroys a massive star is called a A. nebula. B. black hole. C. vacuum. D. supernova.

There are 100 cm in every meter. If a measurement is 1.67 m, what is the measurement expressed in centimeters?