Two masses are compressed against a spring as shown in the figure; the system is at rest. The mass of m1 is 1.2 kg and m2
has a mass of 1.8 kg. When the masses are released, m2
travels to the right at 2.0 m/s. What is the speed of m1 after
the spring is released? Assume the horizontal surface is
frictionless.

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Which type of basaltic lava flow has a fairly smooth

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?