An airplane changes its velocity uniformly from 150 m/s to 60 m/s in 15 s. Calculate:

a. Its acceleration

b. The distance traveled in that time

The Balmer series is formed by electron transitions in hydrogen that a. begin on the n = 1 shell. b. end on the n = 2 shell. c. end on the n = 1 shell. d. are between the n = 1 and n = 3 shells. e. begin on the n = 2 shell.

Why should the safety net that is used in circuses under trapezoids be little tightened?

A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 3.1 g spit ball. part a if he wants the speed of the 20 g carton just after the spit ball hits it to be 0.

Which speed is at the sound barrier? 5 m/s 257 m/s 3.0 x 10⁸ m/s 343 m/s

Which rule for assigning oxidation numbers is correct Hydrogen is usually - 1. Oxygen is usually - 2. Apure group 1 element is + 1. Amonatomic ion is 0.

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.

landslides and mudslides caused by lava flows are ___ deadly than the lava flow itself. a. more b. less

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor