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A transformer with a turns ratio (secondary:primary) of 1:80 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger? ________ V
The activation energy for vacancies in Cu is w.28 eV. Find the fractional number of vacancies at the melting temperature. Estimate the contribution of vacancies to the thermal expansion at the melting temperature.
A child slides down a snow-covered slope on a sled. At the top of the hill, her mother gives her a push at a speed of 1.5 m/s to get her started. find the angle that the hill makes with the horizontal
A tiny ball of mass 0.425 g is suspended by a thread of negligible mass in a horizontal electric field of 400 N/C. what will be the deflection angle of the string
A puddle holds 150 grams of water. If .50 grams of water evaporates from the surface, what is the approx temperature altering of the remaining water.
A man is to pull a 50 .0 kg crate across a level terrain with a force of 50.0 N. What is the coefficient of kinetic friction, if the work done by friction is - 4.30 x 102 J
Select all that apply. Which is the following statements is true?
The magnetic field of the earth at a certain location is directed vertically downward and has a magnitude of 50.0 µT. FIND magnitude of the magnetic force the field exerts on the proton
A golf ball of mass 0.045 kg is hit off the tee at a speed of 34m/s. Find the impulse imparted to the golf ball
A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 14 ? and L = 3.6 mH, find the frequency at which the current is one-half
What is the gravitational force between two 20-kg iron balls separated by a distance of .9 m? What is the height of the table
Steam is expanded from 12.5 MPa and 900 degrees Celsius to 0.30 MPa, 400 degrees Celsius in an adiabatic turbine. Determine the isentropic efficiency of this turbine
Our apparent weight is actually judged not by the force of gravity pulling on us, By what percent will your apparent weight change if you were to travel from the north pole to the equator
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