What layer of the atmosphere is made mostly of hydrogen and helium?

Which is the constructive interference formula for diffraction grating problems? dsin = dcos = dcos = n dsin = n

How much work is required to uniformly accelerate a merry-go-round of mass 1490 kg and a radius of 7.80 m from rest to a rotational rate of 1 revolution per 8.33 s? Model the merry-go-round as a solid cylinder (I = ½ MR2).

How long does it take to fall 500 meters?

Give the approximate bond angle for a molecule with an octahedral shape. A) 109.5°B) 180°C) 120°D) 105°E) 90°

Explain why changes of state are physical change

What is your average speed if you walk 2km in 20 minutes

A skier is traveling down a slope that is inclined 30° above the horizontal. The coefficient of kinetic friction between the skier and the slope is 0.10. Which of the following best describes the acceleration of the skier? A) It is zero.

They are generally thought to be blank naturally occurring emotions that are present from birth

If an aircraft is loaded 90 pounds over maximum certificated gross weight and fuel (gasoline) is drained to bring the aircraft weight within limits, how much fuel should be drained?

3. Shortwave radio is broadcast between 3.50 and 29.7 MHz, To what range of wavelengths does this correspond? Why do you suppose this part of the spectrum is called shortwave radio?