How can one explain the fact that nearly all other galaxies appear to be moving farther away from us?

a) the universe is expanding b) the apparent motion is just an optical illusion

What instrument use lenses or mirrors to collect and focus light from distant objects?

Air becomes wind as it flows from a. low pressure to low pressure. c. low pressure to high pressure. b. high pressure to high pressure. d. high pressure to low pressure.

Light traveling in a vacuum has a wavelength of 550nm when it enters a pool of water (n = 1.33). What would the wavelength of the light be in the water? (a) 336nm (b) 414nm (c) 550nm (d) 732nm

Answers assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 453 mmhg and the temperature is 8.00 ∘c?

You may have noticed that when you recorded the area under the force vs. distance curve you used units of N·m. When you calculated the change in potential energy (∆U) the units where joules (J). Both are a measure of the work.

The density of uranium is 18.8 g/cm3. part a what is this value in kilograms per cubic meter?

What name is given to the variable we plot on the x-axis? A. The dependent variable B. The independent variable c. The linear variable D. The inverse variable

What force is required to accelerate a body with the mass of 15 kilograms at a rate of 8m/s2?

Indicate whether the statement is true or false. A scientific fact is something that is absolute and unchanging.

Show the formula and caculate the speed of a car that traveled 100 km in 2 hours