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A Styrofoam calorimeter contains 40.0g of water at 50°C. To this we add 2.0g of ice at initial temperature of 0°C. Assume that all of the ice has melted at equilibrium.
a) How much heat (in calories) is needed to melt the ice?
A fire hose held near the ground shoots water at a speed of 6.2 m/s.At what angle(s) should the nozzle point in order that the water would land 2.5 m away.
Determine the effective coefficient of kinetic friction between the wheel and the wet rag.
A particle has a charge of +3.1 ?C and moves from point A to point B, a distance of 0.28 m. Find the magnitude of the electric force that acts on the particle
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature, What is the specific heat capacity of the unknown metal
welding machine draws a 18A of current at 240V. When it is inadvertently connected to a 120V outlet, the current in it is 10A. Is the machine's resistance ohmic
A dart is thrown horizontally with an initial speed of 12 m/s toward point P, the bull's-eye on a dart board. How far away from the dart board is the dart released
A capacitor with its plates separated by paper stores 4.6 nc of charge when it is connected to a particular battery. How much charge does the capacitor store
Two concentric metal spheres are found to have a potential difference of 776.0 V when a charge of 3.026·10-8 C is applied to them. What is the radius of the inner sphere
A hot-air balloon is rising upward with a constant speed of 2.50m/s. when the balloon is 3.00 m above the ground, How much time elapses before the compass hits the ground
The dew point at a location 50 km 20° south of west of a recording station is 4°C higher than at the station. what is the local change in dew point at the station
A 2110-kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass) provides a thrust force so that its vertical velocity as a function of time is given by v(t)=At+Bt^2, What was the initial thrust due to the fuel
Suppose that a standing wave on the flagpole gives rise to a sound wave of the same frequency. A person would be able to hear the sound produced by the above standing wave, What is the lowest flagpole harmonic the mouse can hear
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