Calculate the gravitational force between an astronaut (mass of 225kg) and mars (mass of 6.39x1023 kg) when the astronaut is on the
surface of the planet.
use the g. u.e. s.s. method to show your work to earn credit.
(radius of mars = 3 39x106m)

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero