Apoint (a) show that the neutron flux at the distance r from the source is given by source emits s neutrons/sec isotropically in an infinite vacuum 4πr2. (b) what is the neutron current density vector at the same point? [note: neu trons do not diffuse in a vacuum.

Abaseball is thrown a distance of 20 meters. what is its speed if it takes 0.5 seconds to cover the distance

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates