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A 530.9 Watt space heater is designed for operation in Germany, where household electrical outlets supply 230 Volt (rms) service. Determine the power output of the heater when plugged into a 120 Volt (rms) electrical outlet in a house in the United States? Neglect the effects of temperature on the heater's resistance.
A harpsichord string of length 1.65 m and linear mass density 24.4 mg/m vibrates at a (fundamental) frequency of 445 Hz. What is the speed of the transverse string waves
Solve the Friedmann equation to get the scale factor as a function of time.
if you toss a coin straight up while riding in a train where does the coin land when the motion of the train is uniform
a 100 g ice cube at -10deg c is placed in an aluminum cup whose initial temperature is 70deg c. the system comes to an
The plates of a spherical capacitor have radii 33.0 and 42.0 mm. Calculate the capacitance. What must be the plate area of a parallel-plate capacitor withthe same plate separation and capacitance?
Assume the speakers are reconnected so that the 440 Hz sounds they emit are accurately out of phase. At what positions (how far should the microphone be moved to the right) are the intensity maximum and minimum now.
Over a certain region of space, the electric potential is V = 5x - 5x2y + 2yz2. (Use any variable or symbol stated above as necessary.) What is the magnitude of the field at the point P, which has coordinates (5, 0, -5) m
The bullet remains in the block, and after the impact the block lands d = 2.2 m from the bottom of the table. Identify the initial speed of the bullet.
A 0.57-kg air cart is attached to a spring and allowed to oscillate. Find the maximum force exerted on it by the spring
a 2. kg ball moving to the right with a speed of 25m/s collides with a 15. kg ball going in the same direction with the speed of 20 m/s. What is the speed of the second ball after collision if it travels in the same direction as before
The dimensions of a parallel-plate capacitor are all increased by a factor of six. By what factor does the capacitance change? (The dimensions refer to the length and width of a plate and the spacing between the plates.)
A sled is being pulled along a horizontal surface by a horizontal force of magnitude 600 N. Find the instantaneous power created by force
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