A50n box is lifted 2 meters in 3 seconds. a. how much work is done for the box? b. is the work or positive? c. how much power is needed to lift the box?

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block