What is the mass of the necklace
A 0.44 kg meter stick balances at its center. If a necklace is suspended from one end of the stick, the balance point moves 9.5 cm toward that end. What is the mass of the necklace?
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A tank of water sits at the edge of a table of height 1.0 m. The tank springs a very small leak at its base, and water sprays out a distance of 1.2 m from the edge of the table. What is the water level h in the tank?
A rectangular block of ice 6 m on each side and 0.9 m thick floats in sea water. The density of the sea water is 1025 kg/m^3. The density of ice is 917 kg/m^3. How many penguins of mass 24 kg each can stand on the ice block before they get their f
At what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s2.
If S2 moves with a speed of 0.7c with respect to a rest frame S1, find the length of the meterstick as measured in frame S1 according to classical physics.
A ferrari race car on a straight road starts from rest,accelerating at 2.00 m/s^2 until it reaches a speed of 20.0m/s.Then the car travels for 20.0 s at constant speed until the brakes are applied,stopping the truck in a uniform manner in an addit
A driver in a car traveling at a speed of 56.0 mi/h sees a deer 116 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assuming that the deer does not move in the meantim
The radiant energy emitted per second per square meter is the same as the heat lost per second per square meter due to conduction. What is the emissivity of the wall?
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. Calculate the average velocity between t=0 and t=7.5 minutes.
A rope 100 feet long weighing 2 pounds per foot hangs over the edge of a building 150 feet tall. How much work in foot-pounds is done in pulling the rope to the top of the building?
What must the charge (sign and magnitude) of a particle of mass 1.41 be for it to remain stationary when placed in a downward-directed electric field of magnitude 620?
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