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The fundamental frequency of an open-open tube is 1500 Hz when the tube is filled with 0 degree Celsius helium. What is its frequency when filled with 0 degree Celsius air?
A 30.0g ball rolls around the 40.0cm diameter hemishperical track at 60.0rpm. Assume rolling friction is negligible. Determine the ball's linear velocity
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
At a rock concert, the sound intensity 1.0m in front of the bank of loudspeakers is 0.10W/m^2. How much energy is transferred to each eardrum in one second
A 500 kg polar bear of average density 950 kg/m3 is stranded on a melting chunk of ice in the ocean. What is the smallest volume of ice that will keep the bear entirely above water
A 65-kg woman cheats on her diet and eats a 612-Calorie (612 kcal) jelly doughnut for breakfast. If the human body is only 21% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work off her breakf..
A charge of - 0.580uC exerts an upward force of magnitude 0.170N on an unknown charge which is a distance of 0.300m directly below it. What is the unknown charge
Suppose a news report stated that starship Enterprise had just returned from a 5 year voyage while traveling at 0.81c. If the report meant 5.0 years of Earth time, how much time elapsed on the ship
A 5 kg block sits on top of a 10 kg block which rests on a horizontal frictionless surface. What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block
A 318 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 624 mmHg. compute the moles of Ar present.
A skateboarder shoots off a ramp with a velocity of 5.1 m/s,directed at an angle of 59° above the horizontal. The end ofthe ramp is 1.4 m above the ground.
A 10 microF parellel-plate capacitor with circular plates is connected to a 12.0V battery. What is the charge on each plate
A block of mass 4.0 kg is attached to a string and the string is attached to a spring(k=32.0N/m). What is the maximum extension of the spring
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