1. which areas of physics deal with the following?
a. how fast things move_
b. how the shape of a cave affects an echo
c. which sunglasses are best for cutting the glare on a ski slope_
d. how the cooling system in a refrigerator works_
e. what lightning is_ _rare
f. how energy is produced by the sun

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

What is the equation for electrical work?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s