Adirect injection (di) fuel injector system sprays high-pressure fuel, up to psi, into the combustion chamber as the piston approaches the top of the compression stroke. a. 2,900 b. 80 c. 65 d. 1,000

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?