Question 7: Wave Energy (3 points)

Which of the following waves carries more energy?

a) Wave A has a longer wavelength than wave B, but their amplitudes are the same. (1 point)

b) Wave C has a higher frequency than wave D, but their amplitudes are the same. (1 point)

c) Wave E has a higher amplitude than wave F, but their wavelengths are the same. (1 point)

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)