Afisherman casts his bait toward the river at an angle of 25° above the horizontal. as the line unravels, he notices that the bait and hook reach a maximum height of 2.9 m. what was the initial velocity he launched the bait with?
a) 6.3 m/s
b) 18 m/s
c) 7.6 m/s
d) 7.9 m/s

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.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant