Which situation is an example of transferring heat by means of convection?
a) the sun warming the earth
b) the weather patterns outside
c) you toasty-warm in some footy pajamas
d) you accidentally grabbing the hot pan from the oven

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?