Ahiker starts a point p and walks 2.0 kilometers due east and then 1.4 kilometers due north.

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

What is the largest meteoroid that has collided with this planet

It is advised not to hold the thermometer by the bulb while reading it