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​

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.

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?

Need only answer if you think you know it