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When the car you are riding in stops suddenly, heavy objects move toward the front of the car. Why does a helium-filled balloon move toward the rear of the car? Please state any laws of motion, etc governing this answer.
an electron was accelerated from rest through a potential difference of 9900 v. what is its speed? the mass of an
An object is dropped from rest from a height of 4.1 multiply.gif 107 m above the surface of the Earth. what is its speed when it strikes the Earth?
A 50-g block of an unknown material is at 530°C. It is dropped into a thermally insulated cup containing 0.07L of water at 20°C. If the temperature of the compound rises to 50°C, what is the specific heat of the unknown material?
A 9.0W laser beam shines on an ensemble of 1024 electrons, each in the ground state of a one-dimensional infinite square well 0.82nm wide. How many electrons can be so excited if the beam shines for 5.0ms
find out the magnitude of the gravitational force exerted.
One particle has a mass of 4.00 10-3 kg and a charge of +9 µC. A second particle has a mass of 7.00 10-3 kg and the same charge. Find the initial separation between the particles
A cube of ice is taken from the freezer at -7.7°C and placed in a99g aluminum calorimeter filled with297g of water at room temperature of 20°C. What was the mass of the ice cube
Suppose that a parallel-plate capacitor has circular plates with radius R = 40.0 mm and a plate separation of 4.0 mm. Suppose also that a sinusoidal potential difference with a maximum value of 340 V and a frequency of 120 Hz is applied across the..
A train is rounding a circular curve whose radius is 2.00 multiply.gif 102 m. Find the magnitude of the total acceleration (centripetal plus tangential) of the train
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor, How tall is the tower
a bullet is fired from a rifle that is held 1.59 m above the ground in a horizontal position. the initial speed of the
a a lawn mower has a flat rod-shaped steel blade that rotates about its center. the mass of the blade is 0.508 kg and
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