Compared to a radio waves, ultraviolet rays have
a.) more energy and shorter wavelengths
b.) more energy and longer wavelengths
c.) less energy and longer wavelengths
d.) less energy and shorter wavelengths

A.) more energy and shorter wavelengths.

Explanation:

Radio waves and ultraviolet rays are both part of the electromagnetic spectrum. The energy of a wave in the electromagnetic spectrum depends on the frequency of said wave, and the frequency of a wave depends on the wavelength. Shorter wavelength = higher frequency = more energy. Longer wavelength = lower frequency = less energy.

Radio waves have a longer wavelength when compared to ultraviolet rays, so therefore they have a lower frequency and less energy.

Sorry, I suck at explaining things, so I hope I made at least somewhat understandable.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary