6. A pebble is dropped from a high vertical cliff. The collision of the pebble with the ground below is seen 1.5 s after the pebble is dropped. With what speed did the pebble hit the
ground?
(A) 10 m/s
(B) 15 m/s
(C) 48.6 m/s
(D) 100.4 m/s
(E) 343 m/s

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Four 5-gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. use the following specific heat capacity data to determine which block will increase its temperature the most.

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?