55. What will be the de – Broglie wavelength when the kinetic energy of the electron increases by 5 times?

(A) √5 (B) 5

(C) 1/ √5 (D) 1/ 5​

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly