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Calculate the force P required to drag the block of mass 2 kg up the hill of angle 30 degrees at (a) constant velocity, (b) acceleration of 2 m/s^2 up the slope. Calculate the force P down the slope that will keep the block at (a) constant velocity down the slope (b) acceleration of 2 m/s^2 down the slope.
what is the distance of closest approach of the two particles. explain two ways in which you could you this equipment to raise the crate.
A football is kicked at ground level with a speed of 15.0 m/s at an angle of 37.0° to the horizontal. How much later does it hit the ground
nuclear-pumped x-ray lasers are seen as a possible weapon to destroy icbm booster rockets at ranges up to 2000 km. one
A mass of 40.0 grams is attached to a vertical spring with a spring constant k = 20.0 N/m and lowered slowly until the spring stops stretching. How much does the spring stretch
A circular wheel has a radius R = 0.45 + or - 0.02 m. The wheel is observed to be rotating uniformly with period T = 2.00 +or- 0.05 s. Compute the frequency with which the wheel spins
A charge of -3.9 micro-coulombs is launched from the positive plate of a large capacitor to the negative plate. At the positive plate, what is the distance between the plates
you need to determine the density of an unknown liquid. to this end you perform an experiment with a block and notice that the block floats in this unknown liquid with 4.6 cm of its side submerged. determine the density of the unknown liquid
A certain material is in a room at 27°C. If the absolutetemperature (K) of the material is tripled, its resistance doubles.(Water freezes at 273 K.) What is the value for a, the temperature coefficient of resistivity?
a drinking fountain projects water at an initial angle of 50 degrees above the horizontaland the water reaches a
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 heat engine does 376.88 J of work per cycle while exhausting 648.92 J of heat to the cold reservior. what is the cold reservior temperature in degrees Celsius
The process is claimed to produce 2000 J/min of work and to require an undisclosed amount of heat transfer with a heat reservoir at 300 K. Should inventor be issued a patent of this device.
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