A laser produces 20.0 mW of red light. In 1 hour, the laser emits 2.29 X 10^20 photons. What is the wavelength of the laser?

Why do our minds fill in the gaps for information we don't know? (Hint: remember what you learned about Gestalt psychology.)

what happens when light travels from one medium to another with a different index of refraction at a 0 degree angle of incidence?

The first periodic table of elements Mendeleev created contained how many elements

The mean distance of an asteroid from the Sun is 3.90 times that of Earth from the Sun. From Kepler's law of periods, calculate the number of years required for the asteroid to make one revolution about the Sun.

Use these options to describe each genotype. A homozygous dominant B: homozygous recessive C: heterozygous Ww is an example of WW is an example of ww is an example of

You measure a watch's hour and minute hands to be 7.4 mm and 12.1 mm long, respectively. Part A In one day, by how much does the distance traveled by the tip of the minute hand exceed the distance traveled by the tip of the hour hand?

Describe the possible long term impact of a catastrophic event

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A transparent film laminated to a fabric is identified in the study material as a. stretch fabric. b. PVC. c. a skin. d. two-faced fabric

Technician A says that all friction and steel plates in a clutch pack should be replaced during and overhaul. Technician B says that the automatic transmission fluid cooler should always be flushed when a unit is rebuilt or replaced.