Quantum Mechanics Answers

A photon of energy E is scattered by a particle of rest energy Eo. Find the maximum kinetic energy of the recoiling particle in terms of E and Eo.

A photon of energy E is scattered by a particle of rest energy Eo. Find the maximum kinetic energy of the recoiling particle in terms of E and Eo.

A different constant velocity cart travelled 0.980.01 m in 4.20.1s.

Calculate the speed that the car traveled, including uncertainty. Show and explain ALL your working.

What is the relationship between matter and energy in the universe?

1. Changes of mass to energy and energy to mass are observable in all chemical reactions.
2. The sum of mass and energy in the universe is increasing over time.
3. Matter and energy can be converted from one to the other but their sum stays constant.
4. The sum of mass and energy in the universe is decreasing over time.

A mysterious crate has shown up at your place of work, Firecracker Company, and you are told to measure its inertia. It is too heavy to lift, but it rolls smoothly on casters. Getting an inspiration, you lightly tape a 0.60-kg iron block to the side of the crate, slide a firecracker between the crate and the block, and light the fuse. When the firecracker explodes, the block goes one way and the crate rolls the other way. You measure the crate's speed to be 0.052 m/s by timing how long it takes to cross floor tiles. You look up the specifications of the firecracker and find that it releases 9 J of energy. That's all you need, and you quickly calculate the inertia of the crate. What is that inertia?

A 92.2 kg weight-watcher wishes to climb a
mountain to work off the equivalent of a large
piece of chocolate cake rated at 990 (food)
Calories.
How high must the person climb? The
acceleration due to gravity is 9.8 m/s
2
and 1
food Calorie is 103
calories.
Answer in units of km.

In a house four 20W lamps., two 10W and three 40W lamps are used 5hrs daily. Calculate the total power of the house loads and the energy consumed weekly?

Schrodinger's equation for a 3D cube

What is strange about the nature of light?

threshold for a certain metal is 3600 a when source is placed at 1 m from target. determine the maximum energy in ev of the electron ejected by the radiation of wavelength 2000 a