Describe how you could use 2 photographs taken at a different times to prove that the moon us in motion.

If you take two photos at the same time on two different nights from the same location you can compare where it is in the sky.  Weight until the moon and a star are close to being aligned, then weight one week and take another one, the stars don't move, the same stars are in the sky every night, they just come up at a different time do to the orbit of the earth around the sun.

electrical power

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.