Horatio used the flat end of a hammer to remove a nail from a piece of wood. this is an example of using a hammer as an a) lever b) lilly c) inclined plane d) wheel and axle

Removing nail by the flat end of the hammer is an example of using hammer as a lever

Lever is a type of simple machine and we know that machine is anything that makes the work of a human easier. By using hammer to remove a nail from wood is an example of lever. The input force is applied on the handle of hammer and a result the output force is experienced at the nail. Fulcrum is the area between the wood and the mouth of hammer by which we will remove the nail.

not too sure thinking all accelerations are pointed down

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.