An electric heater of 1000w is used for 2 hours a day. what is the cost for using in for a month of 28 days, if 1 unit costs 3.00 rupees.

What produces a record of seismic waves? richter scale seismogram barometer seismograph

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

However, had it been a real sound, the sound's pitch would have been increased by the doppler effect, since the falcon was moving the source of the sound. perpendicular to away from towards at the same speed as