Two equal forces are applied to a door. the first force is applied at the midpoint of the door, the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force exerts the greater torque? a) both exert equal non-zero torquesb) the first at the midpointc) both exerts zero torquesd) the second at the doorknobe) additional information is needed

This is the number of complete movements of a wave per second.

Decreased sensitivity to an unchanging stimulus is known as

69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm