Another 0.575 kg smurf (there are 99 of them...) is now thrown horizontally from a 50.0 m cliff at 8.00 m/s. how much kinetic energy does it have when it is 15.0 m from the ground?

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

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.