All real materials deform under load. A measure of mechanical stiffness is 5 points Young's Modulus of Elasticity. Young's Modulus (E) is defined as the ratio
of stress to strain, where stress is defined as Force/Area, and strain is
defined as the ratio of the length change/original length. If this is the case,
what are the dimensions you'd expect to see for E?
A. M L^-1 T^-2
B. M L T
C. M L^-3 T^-2
D. M L^-1 T^-3

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?