The horizontal surface on which the block (m = 2.0 kg) slides is frictionless.  The speed of the block before it touches the spring is 4.0 m/s.  How fast is the block moving at the instant the spring has been compressed 10 cm?  k = 1500 N/m

If M = 20 kg, what is the tension in string 1?

An airplane flies horizontally with a speed of 500 m/s at an altitude of 350 m.  Assume that the ground is level and there is no air friction.  At what horizontal distance from a target must the pilot release a bomb so as to hit the target?

Hepatitis B virus, hepatitis C virus, and HIV spread most easily through contact with blood.

The hepatitis B vaccine is very effective if the series of three shots is completed.

A reputable business has a uniform rectangular sign 1.0 m in width, supported by two wires as shown.  If the mass of the sign is 6 kg, what is the tension in wire A on the left? (Select closest answer)

 (Extra Credit  worth 5 points):  All of the above objects have the same mass M, and the same radial distance R from the axis of rotation as shown.  Which two objects have the same moment of inertia about the central axis? (Select a correct answer and show work to prove why!)

This reverse half circle lens is made out of glass (nglass = 1.5) and is surrounded by air (nair = 1.0).  The surface on the left is flat.  The radius of curvature on the right is R = 3 cm.  For incoming rays from the left, what is the focal length of this lens?

Which condition is closely linked to heart disease?

The wave function for a traveling wave on a taut string (in SI units) is y = (0.35m)cos[2π(x – 10t)].  If the mass density of the string on which the wave propagates is 0.005 kg/m, what is the transmitted power? (Select closest answer)