Astudent wanted to investigate whether or not the temperature of the water would affect the solubility of sugar. she had three glasses of water, each with 200ml of water in them. one was at 10 c, the second at 25 c and the third was at 40 c. she found that the warmer waters dissolved more sugar. what are the independent and dependent variables?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

The least penetrating form of radiation is

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron