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A heat engine exhausts its heat at 380 Celsius and has a Carnot efficiency of 39%. What exhaust temperature would enable it to achieve a Carnot efficiency of 49%?
A loudspeaker diaphragm is oscillating in simple harmonic motion with a frequency of 950 Hz and a maximum displacement of 0.65 mm. What is the magnitude of the maximum acceleration
two point charges -2q and 3q are on the x-axis -2q at the origin and 3q at x d. choose the potential to equal zero at
A parallel plate capacitor with a plate area of 30.0 cm2 and air in the space between the plates, which are separated by 1.7 mm, is connected to a 18.0-V battery. If the plates are pulled back so that the separation increases to 5.1 mm, how much work..
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.02 m, respectively. Calculate the speeds of the tips of both rotors
What is the force of air resistance. how high was the jump.
Take the initial direction of motion to be the positive direction. (Indicate the direction of the acceleration by the sign of your reply.)
A blackbody is emitting radiation at a rate of 25 W at 27oC. what is the rate of emission
A bullet is fired from a rifle that is held 1.69 m above the ground in a horizontal position. Calculate the time it takes for the bullet to strike the ground
A group of explorers in Antarctica can obtain water only by melting ice. They wish to make 4 cups of coffee, determine the amount of heat required and the amount of power required
how long does it take light to travel through a 6.73 mm thick piece of window glass? through what thickness of water
A bowling ball (mass 7.2 kg, radius = 0.11 m) and a billiard ball (mass = 0.38 kg, radius = 0.028 m) may each be treated as uniform spheres. what is the magnitude of the maximum gravitational force that can exert on the other?
What is change in electrical potential energy of electron
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