A75.0kg person is put on an exercise program by a physical therapist, the goal being to burn up 520 food calories in each daily session. recall that human muscles are about 22.0% in converting the energy they use up into mechanical energy. the exercise program consists of a set of consecutive high jumps, each one 45.0cm into the air (which is pretty good for a human) and lasting 1.50s , on the average.
how many jumps should the person do per session?
how much time should be set aside for each session?

There is a theory that indicates that dinosaurs became extinct when about 65 million years ago, a large asteroid hit the earth surface. dust caused by this collision blocked the sunlight reaching the earth's surface and many forms of life became extinct due to the cold. fearing this threat, how large the radius of an asteroid should you be looking for if the dangerous asteroid size is approximately the same as the one that killed the dinosaurs? available data suggests that about 18% of that asteroid's mass ended up as a dust spread evenly over earth after eventually settling out of the upper atmosphere. about 0.0180 g/cm^2 of dust, which is chemically different than the earth's rock, covered the earth's surface. typical asteroids have a density of about 1.9 g/cm^3. now that we know the size of the asteroid, how much energy was released during impact, assuming all of it was just the kinetic energy of the asteroid right before the impact?

If y gets smaller as x gets bigger and y have an relationship?

The solid that is formed and usually sinks to the bottom of a solution is the