Can someone plz help me:Find resonant frequency for different values of magnetic field,

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

The slope of a velocity time graph over any interval of time gives the during that interval

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)