Inductor having a cross-sectional area
Suppose you wish to make a solenoid whose self-inductance is 1.0 mH. The inductor is to have a cross-sectional area of 1.80 x 10-3 m2 and a length of 0.053 m. How many turns of wire are needed?
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To determine the health benefits of walking, researchers conduct a study in which they compare the cholesterol levels of women who walk at least 10 miles per week to those of women who do not exercise at all.
A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated.
"The Poisson distribution can be a reasonable approximation of the binomial distribution." Explain why this may/may not be true.
A ball of mass 0.208 kg has a velocity of 1.41 i m/s; a ball of mass 0.305 kg has a velocity of -0.409 i m/s.They meet in a head-on elastic collision. (a) Find their velocities after the collision.
The 0.78 kg bob of a pendulum is fired from rest at position A by a spring which has a stiffness of k = 1.62 kN/m. The spring is initially compressed 125mm.
A 3000-lb car accelerates under constant power from 60 mile/h to 90 mile/h on a 0.25 mile straight, level test track. Determine the horsepower that is delivered to the drive wheel.
(a) what is the resulting angular speed of the platform and (b) what is the ratio of the new kinetic energy of the system to the original kinetic energy?
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