1. on which date does the antarctic circle have 24 hours of daylight? a. june 21
b. march 21
c. september 21
d. december 21

2. when energy is transferred to air, what happens to the particles of air? a. they move slower.
b. they move faster.
c. they cool down.
d. none of the above

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.