Which of the following is a physical change?
a.
striking a match
b.
baking a cake
c.
sea water drying up and leaving a salt residue
d.
cellular respiration

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)