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Q. You push with a 20 N horizontal force on a 2kg mass resting on a horizontal suface against a horizonatal friction forces of 12N. What is the accerlation ?
Q. A 45000g brass sculpture gains 180480 J of thermal energy as its temperature increases from 28 degrees celsius to 40 degrees celsius. What is the approximate specific heat of brass?
Two long thin parallel wires 13.0 cm apart carry 32 A currents in the same direction. Determine the magnetic field at point P, 12.0 cm from one wire and 5.0 cm from the other.
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
assume the film show in the figure has an index of refraction of 1.36 and is surrounded by air on both sides.
The springs of a 1400 kg car compress 6.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations.
A 1260 kg is pulling a 335 kg trailer. Together the car and trailer have the acceleration of 2.15 m/s squared. Find out the net force on the car-trailer combination.
A circular hole in an aluminum plate is 3.263 cm in diameter at 0.000°C. What is its diameter (in cm) as the temperature of the plate is raised to 129.8°C? Give the answer to four significant figures. The linear expansion coefficient of aluminum i..
An uncharged spherical conducting shell surrounds a point charge - q at its centre. Then a charge +3q is placed on the outside surface of shell.
Monochromatic light (640 nm) strikes a pair of slits at normal incidence, forming the double-slit interference pattern on a screen located 1.82m from the slits. It shows the interference pattern observed on the screen. What is the slit separation.
carnival ride has a large horizontal steel disc of radius 5m from which cars are suspended by a 6m long chain. the disx is rotated about its axis so that the cars swing out and revolve in a circular path. at operation speed the angle of the chains ..
A spherical Christmas tree ornament is7.18 cm in diameter.What is magnification of the image ofan object placed 8.6 cm away from the ornament.
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
What is mass of the block of ice
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