11. An unbalanced force of 2 Newtons is applied to a mass and the mass accelerates. If a force of 1 Newton was applied to the same mass, the acceleration will be
a. The same
b. Twice as much
c. Half as much
d. Four times as much

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Ways that industry and agriculture use physical properties to separate substances