If a 5-solar-mass black hole has a radius to its event horizon of 15 km, the radius of the event horizon of a 50-solar-mass black hole will be km.

70 give a real life example showing how sensory neurons work with the motor neurons

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

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?