According to the principle of overload you should
a. gradually increase the difficulty of a workout
b. gradually decrease the difficulty of a workout
c. engage in challenging exercise during workouts
d. vary the exercises in a workout over time

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?