Water from a fire hose knocks over a wooden shed. Compared with the pressure within the water, the pressure exerted against the shed is a) less.
b) the same.
c) more.
d) nonexistent.

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.

Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?