An experiment is conducted where students measure the angle of a swing, time of swing, length of swing, and mass of weight for a swinging weight hanging by a string attached to a fixed point on the ceiling. The students vary the angle, length and the weight mass. What is the independent and dependent variables?

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Which sections of the heating curve illustrate this process?

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?