Which of the following statements about the planets is not true?
a. mercury has a greater eccentricity than venus.
b. uranus has the smallest mass of the outer planets.
c. neptune has the shortest rotation period of any planet.
d. earth is the most dense planet.

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same