In a vacuum, radio waves, visible light, and x-rays all have the same A. Frequency
B. Energy
C. Speed
D. Wavelength

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.