In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solarradiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank.Assume that the efficiency of the overall system is 12.0% (that is, 88% of the incident solar energy is lost from the system). Whatcollector area is necessary to raise the temperature of 450 L of water in the tank from 19°C to 36°C in 2.5 h when the intensity ofincident sunlight is 480 W/m2? The specific heat of water is 4186 J/kg-K. The density of water is 1.00 g/cm.13NumberUnits A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water (1 g/cm³) and a specific heat 0.217times that of water (1 cal/gxC*). When the internal energy of the cube increases by 47000 cal its temperature increases by:O5 C°O 10 CO 20 C°O 100 CO 200 C

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Answered: In a solar water heater, energy from…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Suppose a heat engine is connected to two energy reservoirs, one a pool of molten aluminum (660°C) and the other a block of solid mercury (-38.9°C). The engine runs by freezing 1.40 g of aluminum and melting 16.0 g of mercury during each cycle. The heat of fusion of aluminum is 3.97 x 105 J/kg; the heat of fusion of mercury is 1.18 x 104 J/kg. What is the efficiency of this engine? 74.9 4 X Note that the usable energy in a heat engine is the difference between the energy input and the exhaust energy. % Need Help? Watch It Additional Materials eBook
A sample of a monoatomic ideal gas has a pressure of p and volume V. When the gas is warmed, it’s pressure triples and volume triples. This warming process includes two steps, the first at constant pressure and the second at constant volume. Determine the amount of energy transferred to the gas by heat.
The heat engine shown in the figure uses 2.0 mol of a monatomic gas as the working substance. (Figure 1) igure p (kPa) 600- 400 200 0 0 0.025 0.050 V (m³) 1 of 1 Part E part. What is the engine's thermal efficiency? Express your answer using two significant figures. η = Submit VE ΑΣΦ Request Answer ? %
An uninsulated container holds 3.5 mol of an ideal gas at an initial temperature of 300 K. The gas is compressed by a movable piston, and 500 J of work is done on the gas while being compressed. If the final temperature of the gas is 400 K, how much heat flows in or out of the gas during this process?
A particular power plant operates with a heat-source reservoir at 350°C and a heatsink reservoir at 30°C. It has a thermal efficiency equal to 55% of the Carnot-engine thermal efficiency for the same temperatures. What is the thermal efficiency of the plant? To what temperature must the heat-source reservoir be raised to increase the thermal efficiency of the plant to 35%? Again, η is 55% of the Carnot-engine value
4.00 Litres of hydraulic oil is placed in a cylinder with a movable piston, on which a heavy block is placed. The hydraulic oil pressure is maintained at 2.45x105 Pa and the temperature of the oil is raised by 45K. The oil is in the liquid phase and expands by a small amount 1.2x10-3m3. Calculate the work done on the oil and the change in internal energy of the oil. The specific heat capacity of hydraulic oil is 2300J/(kg.K) and its density is 800kg/m3
When a gas follows path 123 on the PV diagram in Figure P12.66, 418 J of energy flows into the system by heat and 2167 J of work is done on the gas. (a) What is the change in the internal energy of the system? (b) How much energy Q flows into the system if the gas follows path 143? The work done on the gas along this path is 263.0 J. What net work would be done on or by the system if the system followed (c) path 12341 and (d) path 14321? (e) What is the change in internal energy of the system in the processes described in parts (c) and (d)?
A container holding 4.20 kg of water at 20.0°C is placed in a freezer that is kept at -20.0°C. The water freezes and comes to thermal equilibrium with the interior of the freezer. What is the minimum amount of electrical energy required by the freezer to do this if it operates between reservoirs at temperatures of 20.0°C and –-20.0°C? (Latent heat of fusion of ice = capacity of water = 4186 J/(kg K), specific heat capacity of ice = 2100 J/(kg K)). 333,700 J/ kg, specific heat kJ
When a gas follows path 123 on the PV diagram in Figure P12.62, 418 J of energy flows into the system by heat and 2167 J of work is done on the gas. (a) What is the change in the internal energy of the system? (b) How much energy Q flows into the system if the gas follows path 143? The work done on the gas along this path is 263.0 J. What net work would be done on or by the system if the system followed (c) path 12341 and (d) path 14321? (e) What is the change in internal energy of the system in the processes described in parts (c) and (d)?

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