Three forces act on an object. Force 1 is 5N due east. Force 2 is 10N due north. Force 3 is 7N directed southeast at 40 degrees (measured from the east axis.) determine the magnitude and direction of the resultant force. (1cm is 1N)

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?