What is required for a rocket to lift off into space?
a. thrust that is greater than earth’s gravity
b. mass that is greater than earth’s
c. very little air resistance
d. more velocity than friction

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)