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The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. The turns ratio of the transformer is 45:1. The primary coil is plugged into a standard 120-V outlet. The current in the secondary coil is 2.0 x 10-3 A. Find the power consumed by the air filter.
An electric heater consumes electrical energy at a rate of P = 350 W, What is the maximum power that could be drawn if the circuit contained a circuit breaker that limited the current to no more than 5 A
The rotor of a toy gyroscope consists of an annular cylinder attached to cylindrical shafts by spokes. The rotor is spun by pulling on a string wrapped around shaft.
a spaceship flies past earth at a speed of 0.900. a crew member on board the spaceship measures its length obtaining the value 400m
An electron moves with a speed of 8.0 × 10^6 m/s along the +-axis. It enters a region where there is a magnetic field of 2.5 T, Calculate the magnitude of the magnetic force on the electron
A cubical piece of heat-shield tile from the space shuttle measures 0.12 m on a side and has a thermal conductivity of 0.072 J/(s m · C°). How much heat flows from the outer to the inner surface of the tile in six minutes
A two-slit interference experiment is set up, and the fringes are displayed on a screen. How does the fringe pattern change
A radiator with a constant temperature of 150o C has a surface area of 5.00 m2. Calculate its rate of heat loss by radiation to the environment
A spring stretches 0.05 m when a 0.3 kg mass is suspended from it. find the charecteristic frequency of this mass on the spring
suppose that r2/r1 = 10.0 cm and ignoring any air inside the shell, find the temperature of the outer surface of the shell.
A 14.8cm diameter loop of wire is initially oriented perpendicular to a 1.3T magnetic field, What is the average induced emf in the loop
At a height of fifteen meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
An ultrasound unit sends a 2.4 MHz sound wave into a 35cm long tube filled with an unkown liquid. What is the speed of the sound in the liquid
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