I tried this problem and keep getting it wrong

Show (a) (AB)t = BtAt (b) (AB)−1 = B−1 A−1

Check your Understanding Repeat the calculations from the previous example for I0=0.040A .

Review A system consists of a planet and a star, with the planet in an elliptical orbit. As the planet orbits, which of these quantities change because they depend on the mass of the planet? Explain your answers. a. Gravitational potential energy b. Gravitational potential c. Kinetic energy d. Gravitational force e. Gravitational field

Why do we need to be careful about work done on the system versus work done by the system in calculations?

A yoga teacher tells her students to imagine their hands are magnets pulling on each other. What are the problems with this metaphor? What is a better metaphor?

(a) At what speed will a proton move in a circular path of the same radius as the electron in the previous exercise? (b) What would the radius of the path be if tlie proton had the same speed as the election? (c) What would the radius be if the proton had tlie same kinetic energy' as die electron? (d) The same momentum?

(a) At what speed will a proton move in a circular path of the same radius as the electron in Exercise 22.12? (b) What would the radius of the path be it the proton had the same speed as the electron? (c) What would the radius be if the proton had the same kinetic energy as the electron? (d) The same momentum?

Verify Equations rn=n2ZaB and aB=h242mekqe2=0.5291010 m using the approach stated in the text. That is, equate the Coulomb and centripetal forces and then insert an expression for velocity from the condition for angular momentum quantization.

Given the polar character of water molecules, explain how ions in the air form nucleation centers for rain droplets.