Clive's car has a top speed of 150 mph. he attaches a roof box to his car. how will this affect its top speed? explain your answer.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

What does si stand for,when referring to a system of measurement

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?