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Q1. A water-skier is moving at a speed of 14.7 m/s. while she skis in the same direction as a travelling wave, she springs upward every 0.870 s due to the wave crests. When she skis in the direction opposite to that in which the wave moves, she springs upward every 0.614 s in response to the crests. The speed of the skier is greater than the speed of the wave. Determine (a) the speed and (b) the wavelength of the wave.
Q2. On your wedding day your lover gives you a gold ring of mass 3.98 g. 59 years later its mass is 3.73 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 177 u.
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An archer puts a 0.26 kg arrow to the bowstring. An average force of 213 N is exerted to draw the string back 1.3 m. unless otherwise directed, suppose that air resistance is negligible. Illustrate energy bar graphs to solve the problem.
A street lamp weight 164N. It is supported equally by two wires that form an angle of 129 degrees with each other. What is the tension of each of these wires.
The top of Mt. Everest is 8750 m above sea level. Assume that sea level is at an average Earth radius of 6.38×10^6 m. What is the magnitude of gravitational acceleration at the top of Mt. Everest? Mass of the Earth is 5.97×10^24 kg.
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
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A space traveller whose mass is 104kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no near planetary objects.
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In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0612 of the original volume and the pressure that is 46 times the original pressure. What is the temperature of the air after the compression.
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