A 78 N block is supported by a spring whose constant is 12 N/m. Calculate the elongation of the spring under this load. a. 6.5 m

b. 1.5 m

c. 8.2 m

d. 7.2 m

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering