Astudent makes a short electromagnet by winding 590 turns of wire around a wooden cylinder of diameter d = 3.4 cm. the coil is connected to a battery producing a current of 4.8 a in the wire.
(a) what is the magnitude of the magnetic dipole moment of this device?
(b) at what axial distance z > > d will the magnetic field have the magnitude 5.4 µt (approximately one-tenth that of earth's magnetic field)?

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8