20 points needs done 1. which statement accurately describes solids? a. they are the least organized of the states of matter. b. they have a definite volume but not a definite shape. c. they expand to fill available space. d. they have a definite shape. 2.a man pulls down on a rope to hoist a sail on a sailboat. this is an example of a machine a. changing the direction over which a force is exerted b. reducing friction over a set distance c. multiplying the distance over which a force is exerted d. multiplying the force exerted 3. forces can be added together only if they are a. unaffected by gravity b. balanced forces c. acting on the same object d. pushing in different directions 4.how does the human body keep warm on a cold day? a. it converts chemical potential energy into thermal energy. b. it converts thermal kinetic energy into potential energy. c. it converts chemical kinetic energy into potential energy. d. it converts thermal potential energy into thermal kinetic energy. 5.what is average speed? a. the rate at which a slope changes b. the rate at which an object is moving at a given instant c. the equivalent to velocity d. the total distance traveled divided by the total time 6.when fossil fuels are burned, what happens? a. their potential energy is converted into electrical energy. b. their potential energy is converted into thermal energy. c. their potential energy is converted into mechanical energy. d. their potential energy is converted into chemical energy. 7.why can steam at 100°c cause more severe burns than the same mass of liquid water at 100°c? a. because the steam takes up more volume than the liquid water. b. the steam has less thermal energy than the liquid water. c. the steam has more thermal energy than the liquid water. d. because when liquid water changes to a gas, it loses energy.