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The during an Apollo moon landing, reflecting panels were placed man the moon. this allowed earth astronomers to shoot laster beams at the moon's surface to determine its distance from earth. the reflected laser beam was observed 2.84 s after the laser pulse was sent. if the speed of light is 3.00x10^8 m/s, what was the distance between the astronomers and the moon?
The average value of the squared speed does not equal the square of the average speed. find the average value of the squared speed
An unknown nucleus has twice the volume of a nucleus with 62 nucleons. What is the atomic mass number of the unknown nucleus
A water balloon is thrown horizontally at a speed of 2.0 m/s from the roof of a building that is 6.00 m above the ground. Determine which balloon hits first and how much sooner it hits the ground than the other balloon
At one instant, a mass (m = 2 kg) is at the location m and attached to one end of a spring with a spring constant ks = 60 N/m and a relaxed length L0 = 0.22 m. The origin is placed where the other end of the spring attaches to the ceiling.
A Coast Guard cutter detects an unidentified ship at a distance of 20.2 km in the direction 16.7° east of north. The ship is traveling at 24 km/h on a course at 40.1° east of north. The Coast Guard wishes to send a speedboat to intercept the vesse..
A particle (Mass=m, charge=e, and Energy=E) is incident on a potential barrier from x
A 720-kg race car can drive around an unbanked turn at a maximum speed of 43 m/s without slipping. The turn has a radius of 160 m, What is the coefficient of static friction between the track and the car's tires
A car rounds a corner of radius 80 m at a speed of 20 m/s. What is the smallest value that the coefficient of static friction between the wheels and the road can have
You measure the length of a futuristic car to be 3.50m when the car is at rest relative to you. what result do you get
A gallon of gasoline contains about 1.3x10^8 joules of energy. A 2000-kg car traveling 20 m/s skids to a stop. Estimate how much gasoline it will take to bring the car back to the original speed
The average banana contains 0.436 g of potassium, and 0.012% of naturally occuring potassium is 40K, What is the activity of a freshly picked bunch containing four bananas
If 20 grams of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? How much ice should melt in order to cool the hot water down to this temerature.
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