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• Air in a cylinder is compressed to one-tenth of its original volume without change in temperature. What happens to its pressure? Imagine now that a valve is opened in order to restore the initial pressure value. What percentage of the molecules have escaped?
• Consider a 40,000 km steel pipe in the shape of a ring that fits snugly all around the circumference of the Earth. We are heating now the ring so its temperature increased by 1 degree C. Now, the pipe will no longer be snug. How high the ring will now stand above ground level? (Make as many simplifications as necessary). Data: Coefficient of linear expansion for steel is 11*10-6 /degree C. This means, for example, that a 1-meter bar of steel that increases its temperature by 1 degree C will expand 11*10-6 meters (11 micrometers)
• Farmers resort to spraying fruit trees with water before a frost to protect the fruit from freezing. Using the concepts learned in this module, discuss why this does or does not work.
• An electric fan not only does not decrease the temperature of the air, but it actually increases air temperature. How can you then explain that you are cooled by a fan
A long solenoid with 12.8 turns/cm and a radius of 8.91 cm carries a current of 21.9 mA. What is the magnitude of the magnetic field there
A sky diver of mass 81.0 kg jumps from a slow-moving aircraft and reaches a terminal speed of 51.5 m/s. What is the acceleration of the sky diver when her speed is 30.0 m/s
A dart is thrown at a dartboard 2.37 m away. When the dart is released at the same height as the center of the dartboard, At what angle relative to the floor was the dart thrown
A man stands between a vertical mirror 0.80 meter tall and a distant tree whose height is H. He is 2.85 meter from the mirror, Evaluate how tall is the tree
Young’s double slit experiment is performed with 589 nm light and a distance of 2.00 m between the slits and the screen. The tenth interference minimum is observed 7.26 mm from the central maximum. Determine the spacing of the slits.
q1. a planet of mass 8 times 1024 kg is at location lsaquo -4 times 1011 7 times 1011 0 rsaquo m. a star of mass 7
Find the buoyant force for the two objects when they are placed into water, Next, find the percent difference between the two buoyant forces
A 50.0-kg woman stands at the rim of a horizontal turntable having a moment of inertia of 560 kg · m2 and a radius of 2.00 m. find With what angular speed does the turntable rotate
A microscope has an objective lens by a focal length of 16.22 mm and an eyepiece by a focal length of 9.50 mm. With the length of the barrel set at 30.0 cm, the diameter of a red blood cells image subtends an angle of 1.43 m rad with the eye.
A guitar string is vibrating in its fundamental mode, with nodes at each end. The length of the segment of the string that is free to vibrate is 0.385 m. What is the amplitude of this standing wave
A fiber optic audio system consists of an input, a playback head that has a transfer function of .7, an amplifier with a gain of 6 and a speaker system with a transfer function of .4. Evaluate the output for an input of 0.08V
An isolated parallel plate capacitor contains charge Q = +10 µC on its plates, corresponding to a potential difference of 10 V. What is the capacitance of this parallel plate capacitor
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