How do scientists know that dark matter exists?

a. it absorbs radio waves.

b. it emits electromagnetic radiation.

c. it exerts a gravitational pull on other matter.

d. it blocks the light coming from other objects.

A 0.145-kg baseball is pitched at 42 m/s. the batter hits it horizontally to the pitcher at 58 m/s. find the change in momentum of the ball.

7) When you combine chocolate powder and milk, the result is best describe as A) a mixture B) an element C) a compound D) a substance

Why do you think a pregnant woman needs more energy from food than a woman who is not pregnant?

A car driving on the turnpike accelerates uniformly in the positive x direction from 80 ft/s (54.5 mph) to 103 ft/s (70.2 mph) in 3.10s. What is the x - component of the car's acceleration?

After a large snowstorm you shovel 2000 kilograms of snow off your side walk in 1 hour. you lift the shovel to an average height of 1.25 meters while you are piling the snow in your yard. how much work did you do?

A projectile was launched horizontally with a velocity of 468m/s, 1.86m above the ground how long did it take the projectile to hit the ground

A racquet ball with mass m = 0.241 kg is moving toward the wall at v = 13.7 m/s and at an angle of θ = 34° with respect to the horizontal.

What type of plate boundary would be found along the coast line near Japan's volcanic mountain ranges

When the current in a toroidal solenoid is changing at a rate of 0.0270 A/s, the magnitude of the induced emf is 12.5 mV. When the current equals 1.30 A, the average flux through each turn of the solenoid is 0.00245 Wb.

A spring tide can occur at what day and month?