A 0.5 kg pot of 80°C tea is poured into a 0.75 kg glass mug. The hot cup of tea starts at a temperature of 80°C and cools to a temperature of 65°C. How much heat does the water lose? (Assume specific heat capacity of tea is the same as water)

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?