In an experiment the hypothesis is if the wavelength of the light shining on a plant is shortened the rae of the photosynthesis is slowed down, if the experiment is preformed the independent variable .. a) will be the wavelength of the light b) will be the plant on whcih the light is shining c) will be the rate of photosynthesis d) can not be determined

Why is there friction between objects

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?