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a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 20m/s the stone travels 100 m horizntally and hits the beach.
A- how long after being released does the stone strike the beach below the cliff?
B- what is the height of the cliff?
C- what is the speed of impact when the stone lands?
D- What is the angel of the impact velocity below the horizontal?
A 45 dB sound wave strikes an eardrum whose area is 4.1 × 10-5 m2. How much energy is received by the eardrum per second
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A house has a floor area of 113 m2 and an outside wall that has an area of 26 m2. The earth's magnetic field here has a horizontal component of 3.0 multiplied by 10-5 T that points due north and the vertical component of 4.9 multiplied by 10-5 T p..
A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane . Determine the speed of the block after it has traveled 1.80 along the plane, ..
The semiconducting compound InAs is widely used for infrared light emitting diodes (LED's). What is the frequency of light emitted by a InAs LED
Decide about the validity of Ampere's Law. Ampere's Law is valid.
Three point charges, -5.2 x 10-9 C, -8.1 x 10-9 C, and +7.7 x 10-9 C, are fixed at different positions on a circle. The total electric potential at the center of the circle is -2300 V
A hot iron horseshoe (mass = 0.50kg ), just forged, is dropped into 1.50L of water in a 0.30kg iron pot initially at 25.0?C. estimate the initial temperature of the hot horseshoe
A 105 granite cube slides down a 40 frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 265 steel cube at rest. How high above the table must the granite cube be released to give the steel cube a speed of..
Suppose the horizontal velocity of the wind against a sail is 5.5 m/s parallel to its front surface and 3.3 m/s along its back surface. Calculate the approximate force on a square meter of sail in N
An open-open organ pipe is 67.9 cm long. AN open-closed pipe has an essential frequency equal to the third harmonic of the open-open pipe. How long is the open-closed pipe.
The top of a refrigerator has an area of 0.6m2. The height of the refrigerator is 180 cm. What volume does refrigerator occupy in cubic meters.
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