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The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 42.0o is 44.0 percent. What is the minimum value of the temperature at which the engine takes in heat? (in oC).
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What is the (magnitude of the) velocity of a rollercoaster at the bottom of a track that is 89.8 m high if it starts from rest? (Use the value g = 9.8 m/s2 for the acceleration of gravity.) Please provide work to explain
Question: At t=0 a grinding wheel has an angular velocity of 30.0rad/s . It has a constant angular acceleration of 27.0rad/s^2 until a circuit breaker trips at time t = 1.60s . From then on, it turns through an angle 433 ...
Question: You're driving down the highway late one night at 16 m/s when a deer steps onto the road 35 m in front of you. Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your ca ...
Question: An object is 40 cm in front of a concave mirror with focal length of 20 cm. what is the postition of the image using ray tracing? The response must be typed, single spaced, must be in times new roman font (size ...
Question: A rectangular wooden block of weight W floats with exactly one-half of its volume below the waterline. The wooden block is removed from the water bath and placed in an unknown liquid. In this liquid, only one-t ...
Question: An object is 40 cm in front of a concave mirror with a focal length of 20 cm. Use ray tracing to locate the image. Is the image upright or inverted? The response must be typed, single spaced, must be in times n ...
Qustion: A pendulum is made by tying a 590 g ball to a 45 cm-long string. The pendulum is pulled 22o to one side, then released. Part A: What is the ball's speed at the lowest point of its trajectory? Part B: To what ang ...
Question: A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.25 \mu {\rm T} and a wavelength of 432 {\rm nm} is traveling in the + x direction through empty space. Write the equations for the electr ...
Question: A parallel-plate vacuum capacitor is connected to a battery and charged until the stored electric energy is . The battery is removed, and then a dielectric material with dielectric constant is inserted into the ...
Question: Ten days after it was launched toward Mars in December 1998, the Mars Climate Orbiter spacecraft (mass 629 kg) was 2.87x10^6 km from the earth and traveling at 1.20x10^4 km/hr relative to the earth. At this tim ...
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