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The cathode-ray tubes that generated the picture in early color televisions were sources of x rays. If the acceleration voltage in a television tube is 14.9kV , what are the shortest-wavelength x rays produced by the television? (Modern televisions contain shielding to stop these x rays.)
What is the maximum height, y2, if the object is thrown with a speed of v2 = 1.99v1 from the surface of Jupiter's moon Io? The acceleration due to gravity on Io is g2 = 1.79 m/s2. Give the reply as a multiple of y1.
A sailboat is heading directly north at a speed of 21 knots (1 knot = 0.514 m/s). The wind is blowing towards the east with a speed of 10.6 knots. (Both velocities are given relative to the Earth.)
The object to be viewed is placed 2mm beyond the focal point of objective lens. What is the overall magnification of this microscope.
What is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 second? Explain your answer and state why this question is an exercise in careful reading as well as in physics.
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, and hits the ground one second after that. how tall is the building? how fast did the ball strike the ground?
A high intensity desk lamp is rated at 45 W and 12 Volts. It contains a transformer in its base that converts 120 V household voltage to the needed level. What is the current in the primary when the lamp is on
A compound microscope has an objective lens of focal length 10.50 with an eyepiece of focal length 14.80, and it produces its final image at infinity. The object to be viewed is placed 2.00 beyond the focal point of objective lens.
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
A sailboat leaves a harbor and sails 1.80 km in the direction 65 degrees sounth of east, the boath then sails 1.1 km in the direction 15 degrees north of east. the trip takes 15 minutes. what is the magnitude and direction.
Two point charges, +3.75 µC and -6.05 µC, are separated by 1.21 m. What is the electric potential midway between them
A 67 kg man weighs 637 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 19 percent of the body weight.
Explain why you think the Petroleum Marketing Practices Act was not passed until 1979 even though gasoline service station franchise arrangements had been in existence for decades before 1979.
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