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1. A 50 kg child jumps into a small pool of water through a distance of 3 m and aquires 1000 J of kinetic energy. Assuming all of this energy goes into heating 10 kg of water in the pool, what is the change in temp of the water?
2. Theoretically the most efficient engine possible is:
a, porsche carrera special engine, b. carnot cycle heat engine, c. cummins diesel d. wankel engine
While remodelling your garage, you need to temporarily splice, end to end, an 80 m long copper wire that is 1.130 mm in diameter with a 49.0 m long aluminium wire that has the same diameter. The maximum current in the wires is 2.00 A.
A block of mass 77 g floats on a fluid, oscillating up and down at a frequency of 8 Hz. What is the value (in N/m) of the effective spring constant of the fluid
In a nuclear experiment a proton with kinetic energy 3.5 MeV moves in a circular path in a uniform magnetic field. a)If the magnetic field is B = 1.1 T what is the radius of the orbit? b) What energy must an alpha particle (q = +2e, m = 4.0 u) and a ..
A pump lifts 320kg of water per hour a height of 3.5m. find the minimum necessary power output rating of the water pump
A cannon tilted upward at 20° fires a cannonball with a speed of 105 m/s. What is the component of the cannonball's velocity parallel to the ground
According to Kepler's third law, the orbital period T of a planet is related to the radius R of its orbit by T2 R3. What is the planet's orbital period
When released, the textbook slides on a horizontal tabletop with coefficient of kinetic friction k = 0.30. Use the work-energy theorem to find out how far the textbook moves from its initial position before coming to rest.
A disk with a mass of 32.3 kg and a radius of 49.7 cm is mounted on a frictionless horizontal axle. Find the acceleration of the block
An electron moving in the positive x direction experiences a magnetic force in the positive z direction. If Bx=0, then what is the direction of the magnetic field? I got the positive y direction, but the answer is the negative y direction, why is ..
At a certain point in a horizontal pipeline, the water's speed is 4.00{\rm m/s}, Find the gauge pressure at a second point in the line
A 72-kg base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. How far does he slide
Consider a Young's two-slit experiment in which the wavelength of light is 45% smaller than the distance between the slits. How many complete dark fringes would be seen on a distant screen
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