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An inventor claims to have developed an engine that takes in 100,000Btu at a temperature of 400 K, rejects 40,000 Btu at a temperature of 200 K, and delivers 15kW . h of work. Would you advise investing money to put this engine on the market?
Usain Bolt is running a 100m dash. He accelerates to top speed over the first 45 m, then runs at a constant speed for the last 55 m, What is his top speed
If the radius is 2.10m and the coefficient of statc fricton between the wall and the people is 0.39. What is the minimum angular velocity at which the floor can be withdrawn?
A baseball is thrown with an initial velocity of 41.4m/s at an angle of 31.2 degree. Find the maximum height that the ball reaches using energy considerations
Explain Earths Magnetism in detail?
Emmy is standing on a moving sidewalk traveling with an initial velocity of 2 m/s, when she experiences some acceleration over the 5-second time period shown in the right-hand graph below. On the left-hand graph, construct a plot of Emmy\'s veloci..
Are any of the elements in given Figure in series or parallel? If so, identify the ones that are. Then if i1 = -5 mA, i2 = 10 mA, and i3 = -15 mA, find i4 and i5.
Determine the work done by a constant 3.0 Newton force that pushes a block 4.0 meter across a horizontal table when the force is applied at an angle of 60o below the horizontal
In a ballistic pendulum experiment, a small marble is fired into a cup attached to the end of a pendulum. How high will the pendulum swing if the marble has an initial speed of 5.65 m/s
John's face is 20 cm in front of a concave shaving mirror of focal length 30 cm. How large an image does he observe
The amplitude of the voltage across an inductor can be greater than the amplitude of the generator emf in an RLC circuit. Find the amplitude of the voltage across the inductor at resonance
a mass at the origin is pulled by four perpendicular ropes, with a force of 10N in the direction of the positive y axis, 8N to the positive x axis, What is the angle at which the force is acting
A roller coaster at the Six Flags Great America amusement parkin Gurnee, Illinois, incorporates some clever design technology andsome basic physics. What is the radius of the arc of the tear drop at the top
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