Which of the following numbers most closely represents the number of galaxies in the universe?

A) hundreds

B) thousands

C) millions

D) billions

A 5 kg block is pulled across a table by a horizontal force of 40 n with a frictional force 8 n opposing the motion. calculate the acceleration of the object

A ship, carrying freshwater to a desert island in the caribbean, has a horizontal cross-sectional area of 2850 m2 at the waterline. when unloaded, the ship rises 9.50 m higher in the sea. how much water was delivered?

During a car accident, a 125 kg driver is moving at 31 m/s and in 1.5 seconds is brought to rest by an inflating air bag. What is the magnitude of the change in momentum of the driver?

5. A 30.0-g rifle bullet traveling 185 m/s embeds itself in a 3.15-kg pendulum hanging on a 2.85-m-long string, which makes the pendulum swing upward in an arc. Determine: a. The vertical component of the pendulum's maximum displacement. (10pts) b.

a thundercloud whose base is 500m above the ground. The potential difference between the base of the cloud and the m ground is 200MV. A raindrop with a charge of 4.0 x 10-12C is in the region between the cloud and the ground.

When light passes straight through an object it is called

What is the end of the lightning bolt called before it strikes the earth?

Explain rate of decay of a material?

a car starts from rest and accelerates at a constant rate of 4.5 m/s^2. What is the final velocity after traveling 1.6 km?

Why do we say that a wave's amplitude is independent of its wavelength, frequency, or speed? Earth Science H