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An object of mass 10 kg is initially at rest. A 50 N force causes it to move horizontally through a distance of 6 m. What is the change in the kinetic energy of this object?
A helicopter is ascending vertically with a speed of 9 m/s. At a height of 200 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach ground.
What are the magnitude and direction of the resultant vector R , when the parallelogram law is applied to A and B?
A gauge-12 wire has diameter centimeters and length meters. while the voltage volts is applied to the ends of the wire, the current is amperes. The concentration of free electrons in the wire is per cubic meter.
If the air in the tube is replaced with a different gas, the frequency of the fundamental standing wave changes to 60·Hz. What is the speed of sound in this new gas
A loudspeaker on a homecoming float - mounted on a pole -- is stuck playing at an annoying 210 Hz tone, What is the intensity of the signal at this point, What is the power of the speaker
A mass, m= 1.23kg is hanging from a string. The string is stretched 0.641m from its natural equlibrium position. If i lift the mass 0.36m and let it go, what will be its maximum velocity
An electric field of 9.45 105 V/m is desired between two parallel plates, each of area 37.0 cm2 and divided by 2.45 mm of air. What charge must be on each plate.
a piano turner hears one beat every 1.1 second when trying to adjust two strings, How far off in frequency is the other string
A 1000-kg car is moving at 30 m/s around a horizontal curve whose radius is 100m. What is the magnitude of the frictional force
Three point charges are located on the positive x-axis of a coordinate system. Charge q1 = 2.0 nCis 2.0 cm from the origin, What is the net force
When 1190J of heat are added to one mole of an ideal monatomic gas, Find the work done by the gas during this process
Light from the sun is incident on the surface of a pond with a smooth surface. The light strikes the surface at the angle of 30 to the surface and is partially reflected. What is the angle of reflection for the reflected portion? What is an angle of ..
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