Pendulum a has a bob of mass m hung from the string of length l; pendulum b is identical to a except its bob has the length 2l. compare the frequencies of small oscillations of the two pendulums.

If jesus walked on water, does that mean he swims on land

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

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.