A rock falls off the top of the grand canyon. If it was initially at rest, how long does it take the rock to achieve a speed of 49 meters per second ?

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;