It is desired to construct a solenoid that will have a resistance of 4.10 ω (at 20°c) and produce a magnetic field of 4.00 ✕ 10^−2 t at its center when it carries a current of 3.95 a. the solenoid is to be constructed from copper wire having a diameter of 0.500 mm. if the radius of the solenoid is to be 1.00 cm, determine the following. (the resistivity of copper at 20°c is 1.7 ✕ 10^−8 ω · m.) (a) the number of turns of wire needed to build the solenoid turns (b) the length the solenoid should have.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

In a series circuit the __ is the same at every point

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d