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Consider two masses m1 and m2 at the top of two frictionless inclined planes. Both masses start from rest at the same height. However, the plane on which m1 site is at an angle of 30 degrees with the horizontal, while the plane on which m2 sits is at 60 degrees. If the masses are released, which is going faster at the bottom of its plane? Or are they both going at the same speed?
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature
A 747 with a wingspan of 60 m is flying across an area of the earth where the earth's magnetic field is 5 x 10 -4 T. how much potential difference is induced between the wing tips
For a demonstration, a professor uses a razor blade to cut a thin slit in a piece of aluminum foil, What is the width of the slit
Two blocks with masses M1=7.90kg and M2=1.20kg are attached by a thin string which goes over a frictionless, Calculate the magnitude of the frictional force acting on M1
Several ice cubes (pi = 0.9167 g/cm3) of total volume Vi = 240 cm3, Calculate the amount of heat energy Qm in J needed to melt the ice cubes (Lf = 334 kJ/kg)
A 3.3kg block sits on a table. A 3.0kg bullet is fired horzontally at a speed of 520 m/s, find the speed of the block immediatley after the bullet exits
A copper block is removed from a 300^0 C oven and dropped into 1 L of water at 20.0^0 C. The water quickly reaches 25.5^0 C and after that remains at that temperature. What is the mass of copper block.
At a certain time a model car's speed was 24 m/s in the positive x direction, What was the average acceleration of the car during this 8.0 s interval
In a typical Hollywood movie stunt, a person jumps off a building and lands on a cushion to safely stop. How much voltage should the battery have to stop the object as it reaches the ground
Tarzan, who weighs 639 N, swings from a cliff at the end of a convenient vine that is 18 m long, What would the greatest force on the vine be during the swing
a thin rod of length 10.3m and mass 20kg is supported at a 30 degree incline. one support is 2.4m and the other is 8.3m from the lower end of the rod, Find the normal force exerted on the rod by the upper support answer in units of N
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