In atomic bombs, a relatively small amount of matter (uranium atoms) is converted to a relatively huge amount of energy (the blast). how does einstein’s famous equation e = mc2 explain this?

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.