If a wave has a velocity of 200 m/s and a wavelength of 4 m what is the frequency of the wave?

Describe as fully as you can how a radiator at one end of a cold room can cause the temperature of a person at the other end of the room to warm up. you should refer to all three types of heat transfer your answer and demonstrate as much understanding as possible in your answer. you may use drawings and/or bullet points and/or paragraphs. your answer is not detailed enough if you fit it within half a page