A car moving at 10 m/s crashes into a tree and stops in 0.26 s. calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. the mass of the passenger is 70 kg

Which of the following are in the correct order from smallest or largest? A) milimeter, meter, centimer, kilometer B) milimeter, centimer, meter, kilometer C) centimer, milimeter, meter, kilometer D) meter, milimeter, centimeter, kilometer.

1. How many hydrogen atoms are in one molecule of table sugar

A child pulls a sled along a rough horizontal surface by applying a constant 20 N force at an angle 60 o above the horizontal. How much work does the child do, in Joules, by pulling the sled 15 meters?

The rhinestones in costume jewelry are glass with index of refraction 1.50. to make them more reflective, they are often coated with a layer of silicon monoxide of index of refraction 2.00.

In addition to gravity, what is the other predominant force that affects the motion of a pendulum? A. the force of friction B. the force of tension C. the force of air resistance D. the restoring force E. the normal force

Which of the following statements does not describe the structure of an atom? a. An atom has a small, dense center called the nucleus. b. Inside the nucleus of an atom are protons and electrons. c. Protons are positively charged sub-atomic particles.

A. Which skill related fitness component is your strongest and weakest?

A 100 N box is placed on an inclined plane that makes a 30° angle with the horizontal. Calculate the component of gravitational force that acts down the inclined plane. A. 25 N B. 50 N C. 87 N D. 100 N

Approximately how many kelvins are equal to 60 c? a. 289k b. 323k c. 333k d. 413k

What are two ways to change velocity?