5. George walks to a friend's house. He walks 750 meters North, then realizes he walked too far. He

turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed

per second?

The law of conservation of mass applies to all chemical reactions.

Suppose that the resistive force of the air on a skydiver can be approximated by f = - bv2. If the terminal velocity of an 82.0 kg skydiver is 33.4 m/s, what is the value of b (in kg/m) ?

A hockey player has an acceleration of - 3.1m/s. how long does it take him to come to a complete stop from a speed if 13m/s

What is the average speed of a car that traveled 300.0 miles in 5.5 hours? Write your answer in km/min

Brycen can cover half a basketball court (about 14 meters) in 4.0 seconds flat! How fast can he run? Question 7 options: 18 m/s 0.28 m/s 3.5 m/s 10 m/s

What is the role of the air spaces in insulating materials? Select all that apply. They trap heat in the spaces. They puts gaps between the particles to slow down conduction. They dissipate energy faster.

Is it true or false that wave interference only occurs with transverse waves?

There have been several proposed atomic models during the last 150 years. Which model best illustrates the Bohr model. This model suggests that an atom's electrons orbit the nucleus in fixed patterns, much like the planets orbit the Sun.

During which type of change should you expect to see different chemical symbols before and after the change?

Ryan is examining the energy of the particles in a bar of gold. What is Ryan most likely studying? thermal energy electric energy potential energy internal energy