A body with a mass of 7.41 kg moves along the x ‑axis, influenced by a conservative force F ( x ) . → F ( x ) = A x 3 ^ x where A = − 4 N m 3 When the body is at position x i = 2.05 m, it is moving with a speed of v i = 6.51 m / s. What is the body's speed when it is at position x f = − 2.65 m?

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

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