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A skier starts from rest at the top of a hill that is inclined at10.5 degrees with the horizontal. The hillside is 200 meters long,and the coefficient of friction between the snow and the skis is.075
How far does the skier move along the horizontal portion ofthe snow before coming to rest?
Electronic flash units for cameras contain a capacitor for storing the energy used to produce a flash. In one such unit the flash lasts for 0.00129 s with an average light power output of 1,657 W.
The current indoor world record time in the 200-m race is 19.92 s, held by Frank Fredericks of Namibia (1996), Find the mean speed in meters per second corresponding to the record time for the 200-m event
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
An electron moves in the positive x-direction a distance of 2.31 m in 2.85·10-8 s, bounces off a moving proton, What is the average speed of the electron
A hospital patient has been given 131-I (half-life = 8.04 days) which decays at 6.2 times the acceptable level for exposure to the general public
A pitcher throws a fastball horizontally at a speed of 150 km/h toward home plate, 18.4m away. If the batters combined reaction and swing times total 0.37s, how long can batter watch the ball after it has left the pitcher's hand before swinging? In t..
A He-Ne laser produces light of wavelength 633 nm with intensity 1.02 103 W/m2, over a beam of cross-sectional area 0.940 mm2. How many photons per second are emitted by the laser?
A half-Atwood's machine consists of two masses, m1 = 8 kg and m2 = 5 kg, which are connected by a light string that passes over a pulley. what speed will it have just before hitting the floor
The reflected sound is then mixed with the transmitted sound and 90 beats per second are detected. The speed of sound in body tissue is 1480.
calculate the de broglie wavelength of a typical person walking through a doorway. make reasonable approximations for
A wire has a length of 7.26 × 10-2 m and is used to make a circular coil of one turn. find the maximum torque that this coil can experience
A 900- kg car collides with a 1200- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car
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