Some species of moths have "developed a unique defence" characteristic of sounding like a bat and therefore fooling a bats sense of echolocation. what is this defence characteristic an example of?

Energy is the ability to do work which measures what

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?

If you divide a speed in miles per minute by 60, you get the same speed expressed in miles