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Question: A heat engine utilizes a heat source at 580 degrees Celsius and has an ideal (Carnot) efficiency of 28%, to increase the ideal efficiency to 34%, what must be the temperature of the heat source?
A solar collector is placed in direct sunlight where it absorbs energy at the rate of 864 J/s for each square meter of its surface. What equilibrium temperature does the collector reach
A bullet with mass 20 grams and velocity 100 m/s collides with a wooden block of mass 2kg. What is the maximum compression of the spring
An sub with a mass of 1800 kg is traveling eastbound at 17 m/swhile a compact car with mass of 900 kg is traveling westbound witha speed of 15 m/s the cars collide head-on becoming entangled.
A standardized biological microscope has an 8.0--focal-length objective. What focal-length eyepiece should be used to achieve a total magnification of.
Consider a parallel plate capacitor composed of two very large (approximate as infinite) square plates, What is the distance between the plates
You whirl a 0.50 kg rock on a string over your head. It takes 1.0 second for the rock to make a complete revolution. The string is 1.5 m long. What is the velocity of the rock, What is the centripetal acceleration of the rock, What is the tension in ..
a reseacher wishes to estimate with 95 confidence the percentage of adults who support abolsihing the penny. his
A 6.00m long string sustains a three-loop standing wave pattern as shown. The wave speed is 2.00 x 10^2 m/s. What is the frequency of vibration
The resonant LC circuit in your radio contains a coil with L = 0.363 mH inductance. By turning the radio knob you adjust the capacitor to C = 34.1 pF. What is the wavelength of the radio waves your radio is receiving?
Light from a helium-neon laser (? = 633 nm) passes through a circular aperture, What is the diameter (in mm) of the hole
A capacitor that has air between its plates is connected across a potential of 24.0 V and stores 48.0 uC of charge. Find the capacitance of the capacitor
A 1.78 m long air column is open at both ends. The frequency of a certain harmonic is 828 Hz, and the frequency of the next-higher harmonic is 920 Hz. find out the speed of sound in the air column.
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