Why does the sun gravitationally dominate all other objects in the solar system?
a. the sun is by far the most massive object in the solar system.
b. the sun is the closest object to planet earth.
c. the sun moves at a greater speed than any of the other objects in the solar system.
d. the sun is by far the brightest object in the solar system?

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped