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A 603.7-W space heater is designed for operation in Germany, where household electrical outlets supply 230 V (rms) service. What is the power output of the heater when plugged into a 120-V (rms) electrical outlet in a house in the United States? Ignore the effects of temperature on the heater's resistance.
A near-sighted person's eyeglasses has a focal length of ? 22.0 cm, and the lens is 1.8 cm from the eye. what should be the focal length of the corresponding contact lens
A sound source radiates sounds uniformly in all directions. the intensity of the sound at a distance of 100 m is 1.00 x 10^-4 W/m^2. What is the power of the sound source
The electric potential at a position located a distance of 18.3 mm from a positive point charge of 8.50×10-9C and 13.3 mm from a second point charge is 1.10 kV
The diffraction pattern of a uniformly illuminated double-slit aperture consists of bright fringes spaced 5.00 cm apart on a screen 2.00 m from the aperture. what is the slit width and slit seperation
A mass-spring system with a natural frequency of 4.4 Hz is started in motion with an initial displacement from equilibrium of 5.7 cm, What is the amplitude of the resulting motion
Water runs out of the horizontal drainpipe at the rate of 120 liters per minute. It falls 3.20 m to the ground. Assume the water doesn't splash up, what average force does it exert on the ground? (1 liter = 1 kg.)
2.1 g of helium at an initial temperature of 120 deg C and an initial pressure of 1.0 atm undergo an isothermal expansion until the volume has doubled. What is the change in thermal energy of the gas
An FM radio station transmits at a frequency of 80 MHz and a total power of 65 kW. How many photons does this station emit each second
At what driving frequency fd do two phasors have the same length? At that driving frequency, what are (c) the phase angle in degrees, (d) the angular speed at which the phasors rotate, and (e) the current amplitude?
After a 0.785 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.53E+6 m/s, What was the Compton shift in the photon's wavelength
A woman walk up a flight of stairs. The gain in her gravitational potential energy is U, and her power output isP. what's her gain in potental energy
A 1.00 uF capacitor is connected in parallel with a 2.00 uF capacitor. The 1.00 uF capacitor carries a charge of +10.0 uC on one plate, Find the equivalent capacitance of the two capacitors
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