A lightweight plastic rod has a mass of kg attached to one end and mass of kg attached to the othe end. The rod has a length of 0.80 m. How far from the 1.0 kg mass should a string be attached to balance the rod?

What is the frequency of a light wave with a wavelength of 620nm

Abird sitting high in a tree is an example of what type of wnergy

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?