Quantum Mechanics Answers

A car starts from rest travels on a straight road and its wheel rotates 500 rotations in 15 s. If the diameter of a car’s wheel is 60 cm, calculate the distance traveled by the car.

1. Say, Mr. X runs on a plain land and jumps from a spot in forward direction. Recognize and

describe his jumping motion through an equation and make an argument for your answer.

Miss Y agreed to keep a request from her friend to cook rice in an aluminium pot. A metal cover was used on the top of the aluminium pot during cooking, but after a short-while the metal cover was fallen down. They involved in a debate to explain it using a theorem of physics why the metal cover has been fallen down from the top of the aluminium pot. Miss Y said that it was due to produced pressure but her friend agreed on it to some extent and also asked about the conversion of energy, demanding to show the expression for the theorem. Could please help Miss Y?

In 1897 JJ Thomson did experiment with kinetic energies of 200 eV which passed through a pair of plates with 2 cm separation. Use a calculations to explain why JJ Thomson saw no evidence for wavelike behaviour of elecrons.

A vector of magnitude 5 units in the North direction is combined with another vector to give a zero resultant. What is the other vector?

           Natalya throws a shot put. The shot leaves her hand 1.9 m above the ground at a velocity of 8.0 m s-1 at an angle of 37o to the horizontal. Calculate the time between the shot leaving her hand and hitting the ground. Start by working out the initial vertical component of the shot put motion.

a motorist traveling at 72 kilometre-per-hour on citing a stop road signs apply the brakes such that under constant deceleration the car is brought to stop within a distance of 50m.what is magnitude of the deceleration

microscopic object travelling with a speed v is associated with a quan- tum wavepacket which is shaped in the form of a Gaussian. If w is the width of the Gaussian wavepacket at half its maximum value, then find an expression in units of Hertz, which provides a fair estimate of the “uncer- tainity in frequency”, corresponding to the group of waves which compose this wavepacket.