Ralph and Jim are trying to push a large crate along a wooden floor. Ralph pushes with 150 lb of force and Jim with 208 lb of force just as the crate is about to move. The full crate weighs 625 lb. (yes, a FBD is always required)
a) What is the coefficient of friction? (2 dec. plc)

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)