If the coefficient of kinetic friction between an object with mass M = 3.00 kg and a flat surface is μk= 0.530, what force will cause the object to accelerate at 2.50 m/s2? The force is applied at an angle of θ = 30.0° a) Calculate the force.

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?