The drawing shows a 26.1-kg crate that is initially at rest. note that the view is one looking down on the top of the crate. two forces, and , are applied to the crate, and it begins to move. the coefficient of kinetic friction between the crate and the floor is k = 0.347. determine the (a) magnitude and (b) direction (relative to the x axis) of the acceleration of the crate.

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

conduction, convection, radiation

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