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Alice drops a rock to a well. She hears the splash of the rock 4.1 seconds later. The speed of sound is 340 m/s. How deep is the well?
A block of weight w = 25.0N sits on a frictionless inclined plane, which makes an angle theta = 29.0^\circ with respect to the horizontal, as shown in the figure. (Figure 1) A force of magnitude F = 12.1N , applied parallel to the incline, is just..
Batman throws a bat grenade at an angle of 44 degrees to the horizontal with a speed of 17.80 meters per second. How far does it travel.
a ray of sunlight is passing from diamond into crown glass the angle of incidence is 29.00deg. the indices of
a marble is projected up along a 17 deg incline track at an initial speed of 2.1ms and then coasts without friction. a
In a decay process the ß has a kinetic energy of 0.65MeV, and the neutrino energy is 0.15MeV. find the disintegration energy
The threshold or cut-off frequency for sodium is 4,40x10 14 hz. Calculate the wave length of the electrons ejected from the surface
An object is solid throughout. When the object is completelysubmerged in ethyl alcohol, its apparent weight is 15.1 N. What is the volume of the object
To store the energy produced in 1hour by a 110 electric power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Suppose the upper reservoir is 510 meters above the lower one, and we can neglect the sm..
A platinum resistance thermometer has resistances of 220.0 when placed in a 0°C ice bath, What is the melting point of this substance
A spherical charged shell of radius R1 is concentric with a spherical charged shell of radius R2=2R1. The surface density of outer shell is +4.0 uC/m2. The electric field out of the outer shell is 0.
A block of mass 3.0 kg lies on a horizontal surface. The coefficient of static friction among the block and the surface is 0.470. By raising one end of the surface, the angle (relative to horizontal) of the surface is slowly increased. At what angle ..
a cylinder contains 4.56 mol of helium gas at a temperature of 310 k. the molar specific heat of helium at con- stant
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