Light enters air from water. The angle of refraction will be

A rock is thrown at an angle such that the initial horizontal velocity is 15.0 m/s and the initial vertical velocity is 39.0 m/s. What is the greatest height the rock reaches? A. 38.8 m B. 46.9 m C. 77.6 m D. 98.2 m

How has God designed sound waves so that a person is able to hear all the different instruments in a musical piece at the same time?

the sample of an ideal gas is in a tank of constant volume the sample absorbs heat energy so that its temperature changes from 300 to 600 K if v is the average speed of the gas molecules before the absorption of heat and v is their average speed

Explain the difference between the following three substances: carbon c., carbon dioxide (CO2), and oxygen (O2)

Galilee said that if you rolled a ball along a level surface it would be

A wave has a wavelength of 50 m and a speed of 200 m/s. What is the frequency of this wave in hertz?

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

Which of the following best describes the earth's average surface temperature for the past 900,000 years? A. a steady warming trend B. fairly steady temperatures until recently C. prolonged periods of cooling and warming D.

A capacitor with initial charge q0 is discharged through a resistor. What multiple of the time constant τ gives the time the capacitor takes to lose (a) the first 1/8-th of its charge (b) 7/8-th of its charge?

A sheet of paper has a mass of 5 grams. The paper is dropped from a high building twice (it reaches terminal speed in both cases), once as a flat paper of area 600 cm2 and once crumpled as a ball of radius 2 cm.