How long would a space heater have to run problem
How long would a 2.00 kW space heater have to run to put into a kitchen the same amount of heat as a refrigerator (coefficient of performance = 4.00) does when it freezes 2.25 kg of water at 22.0°C into ice at 0.0°C?
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The intensity of a sound wave is the rate of energy transferred to an area perpendicular to the waves, and is given by the relationship I = P/A. What is true about the power transmitted in a wave if the unity area decreases with a constant intensi
A downward force F = 180 N is applied to the bar at a location midway between the two supports. The resulting deflection at the midway location is delta = 4 mm. Estimate the elastic modulus (in GPa) of the material.
A wire with a length of 2.7 m and a mass of 0.89 kg is in a region of space with a magnetic field of 0.72 T. What is the minimum current needed to levitate the wire?
0.3g of magnesium is mixed with 50ml of 1mol/L HCl. The temperature of the solution increased from21.10C to 510C, What is the molarenthalpy of combutsion for magnesium?
When ethanol is heated with an excess of acidified potassium dichromate,it is converted to ethanoic acid:What other substance and conditions are needed to carry out this reaction?
When you push a 1.80- book resting on a tabletop, it takes 1.65 to start the book sliding. What is the frictional force exerted on the book when you push on it with a force of 0.90 ?
What mass og magnesium phosphate is produced when7.00g of magnesium hydoxide reacts with 9.00g of phosphoricacid?
The pressure in the condenser is 50 kPa. If the cycle is ideal, with exception of the turbine, find the cycle efficiency when the turbine isentropic efficiency is 85%.
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