Examples were friction is not useful

Which experiment has a non-uniform probability model? Select two answers. A. Tossing a fair coin one time B. Randomly guessing the answer to a question on a multiple choice test that has four answer choices for each question C.

Which layer is the most dense layer of earth? A. outer core B. mantle C. inner core D. crust

Why can't we see the sun's corona under normal condition?

What is the value of work done on an object when a 70 newton force moves it 9.0 meters in the same direction as the force

it took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 miles per hour. How many miles lie between the two cities?

A 100 kg train traveling at 20 m/s crashes into a stationary 400 kg car. After the collision the car and the train are stuck together. What is their velocity.

How your weight would change with time if you were on a space ship traveling away from, earth toward the moon

A heavy planet and a light planet are found to have the same momentum. What do we know about their speed? A. The light object is slower B. The heavy object is slower C. They have the same speed

Solar cells are used to a. photograph sunspots. b. convert sunlight into electricity. c. convert sunlight and carbon dioxide into sugars. d. convert electricity into solar energy.

What scientific evidence supports the Big Bang theory? Universe expansion Redshift Composition of the universe All of the above None of the above