The diagram shows the mechanical parts of scissors. which best compares scissors and a seesaw? a. both involve the use of wedges. b. both involve the use of levers. c. both are compound machines. d. both are simple machines.

An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemaker’s electrodes is 550 ω. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of