an engine supplies 40,000 joule of heat energy per minute what is the power of the engine in kilowatts

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

With physics question #5? for any !

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?