Stars that form from a large amount of mass (5 x mass of the sun) usually end life by? A-exploding as a supernova, which may leave a neutron star or black hole remaining.
B-expanding as a red giant, then collapsing into a white dwarf.
C-fading as a blue quasar, then collapsing into a black hole.
D-leaping into hyperspace as a pink Death Star, then exploding into a fuzzy planetary nebula.

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.