Electromagnetic Waves
1. Gamma-ray bursters are objects in the universe that emit pulses of
gamma rays with high energies. The frequency of the most energetic
bursts has been measured at around 3.0 x 102 Hz. What is the wave-
length of these gamma rays?

The cement bag shown in the figure has a mass of 50 kg and the small pulley has a mass of 2 kg. if the cement bag is pulled upwards with an acceleration of 2 m/s^2, find the force f pulling the rope.

Aresearcher plans to conduct a test of hypotheses at the 1% significance level. she designs her study to have a power of 0.90 at a particular alternative value of the parameter of interest. the probability that the researcher will commit a type ii error for the particular alternative value of the parameter at which she computed the power is: a. 0.90. b. 0.01. c. 0.10. d. equal to 1

What should the power status of a circuit be when measuring resistance with an ohmmeter?