If the velocity of the car is 39 m/s, then how long does it take the car to travel 400m?

In a lunar eclipse how does the moon cover the sun if the moon smaller then the sun?

A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and then stops, what impulse did he imply on the ball? What is the ball's velocity?

You raise a 1200-N piano a distance of 5.00 m using a set of pulleys. You pull in 20 m of rope while exerting a force of 340 N.

Acceleration of an 82 kg couch that is pushed across the floor with an unbalanced force of 21N

Using the periodic table entry below, match the phrases with their corresponding values. 1. atomic number 2. atomic mass 3. number of orbits 4. number of neutrons 5. number of electrons in n=3 6. number of valence electrons A. 197 B. 79 C. 1 D. 18 E.

Consider this statement: Air is matter. Which facts best support the statement? A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F.

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.

Read the given list of organisms. squirrel, zebra, tortoise, rabbit, horse What best describes the role of these five organisms in a food web?

What are the SI units for specific heat capacity