If a man with a mass of 80 kg stops at the bottom of a building and wants to climb to the top. If the height of the building is 9 meters above the
ground, calculate the potential energy of the man while he isstanding below the
building with respect to the roof of the building?

Explain the doppler effect in terms of frequency, wavelength, and speed.

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

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.