If a baseball is thrown horizontally, what kind of vertical velocity does it have?

A. none

B. a constant velocity

C. one that increases over time

Why do astronauts need to wear pressurized suits in space? a. Because air pressure is so great in space they could be crushed without the suits. b. Because without the pressure in the suits the astronauts could freeze to death. c.

Which of the following statements about this system of lumps must be true? A. The momentum of the system is conserved during the collision. B. The kinetic energy of the system is conserved during the collision. C.

How many meters of the rock wall eroded between 1910 and 1927?

A test taker makes an estimate for a 30-second time interval. The estimate is 34.5 seconds. What is the percent error in this example?

How do you spell hard water in three letters.

3. A hydraulic lift is used to jack a 950-kg car 45 cm off the floor. The diameter of the output piston is 23 cm, and the input force is 375 N. a. What is the area of the input piston? (10pts) b.

An electric current in a metal consists of moving (A) Protons (B) neutrons (C) electrons

How does the idea of rotating disk in the nebular model explain certain observed celestial phenomena?

If a small child were to release a balloon into the atmosphere, what would happen to the size of the balloon as it makes it way higher in the sky?

Is a aluminum pie plate an element