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200 mL of water at 20.0 C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 4.00. How much heat energy is exhausted into the room as the water is changed to ice at -5.00 C?
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window
At an instant in time, an electron has a velocity of 5i + 3j - 4k km/s in a region of space, Find the acceleration of the electron at this instant
The three charged particles in the figure below are at the vertices of an isosceles triangle (where d = 1.60 cm). Taking q = 8.20 µC, calculate the electric potential at point A
A series RLC circuit contains an AC generator (120 volts rms, frequency = 60 Hz), a 35.0 ohm resistor, a 1.49×10^?5 F capacitor, Determine the inductive reactance
A hot iron horseshoe (mass = 0.38 kg), just forged (Fig. 14-16), is dropped into 1.68 L of water in a 0.33 kg iron pot initially at 20 °C. estimate the initial temperature of the hot horseshoe
A round object has a rotational inertia of I = ?MR2, where ? is a constant, M is its mass and R is its radius. What fraction of the total kinetic energy is rotational
A 76 W light bulb with a resistance of 178 ? is connected to a power supply with a 117 V, What is the internal resistance of the power supply
You were driving a car with velocity ‹ 19, 0, 11 › m/s. You quickly turned and braked, and your velocity became ‹ 13, 0, 15 › m/s. The mass of the car was 1200 kg. What was the (vector) change in momentum
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown
After the engine is ignited, what is the rocket's speed when the spring has stretched 19.00 cm past its natural length? What would be the rockets speed after travelling the distance if it weren't tied down to spring.
A relaxed crystalline lens has a refractive index n=1.42 and radii of curvature R1=+10.0mm, Calculate the focal length and optical power of the lens
A 1.0 kg ball drops vertically onto a floor, hitting with a speed of 28 m/s. It rebounds with an initial speed of 12 m/s. What impulse acts on the ball during the contact
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