|A snow maker at a resort pumps 130 kg of lake water per minuteand sprays it into the air above a ski run. The water droplets freeze in theair and fall to the ground, forming a layer of snow. If all the water pumpedinto the air turns to snow, and the snow cools to the ambient air temper-ature of – 7.0 °C, how much heat does the snow-making process releaseeach minute? Assume that the temperature of the lake water is 12.0 °C,and use 2.00 x 10° J/(kg · C°) for the specific heat capacity of snow.*66.

Given data: The mass of the water pumped by snow maker per minute is m=130 kg. The ambient air…

Answered: |A snow maker at a resort pumps 130 kg…

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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Review | Seals may cool themselves by using thermal windows, patches on their bodies with much higher than average surface temperature. Suppose a seal has a 0.030 m? thermal window at a temperature of 30° C.(Figure 1) Part A If the seal's surroundings are a frosty -18 °C, what is the net rate of energy loss by radiation? Assume an emissivity equal to that of a human. Express your answer in watts. ? Qnet W At Submit Request Answer Figure < 1 of 1 < Return to Assignment Provide Feedback 33.0 C 30 25 20 15 62 min 1.5°C
Q3 The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kl/kg and specific volume of 0.06 m:/kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv"= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. Calculate the heat rejected to the cylinder cooling water per kilogram or gases during the expansion stroke. The worke done by the system is 465.96 kj/kg
A granite ball of radius 9.00 m and emissivity 0.046 is heated to 150°C. (a) Convert the given temperature to Kelvin. (Enter your answer to at least the nearest Kelvin.) K (b) What is the surface area of the ball? m2 (c) If the ambient temperature is 25.0°C, what net power does the ball radiate? W
A granite ball of radius 4.00 m and emissivity 0.042 is heated to 150°C. (a) Convert the given temperature to Kelvin. (Enter your answer to at least the nearest Kelvin.) K(b) What is the surface area of the ball? m2(c) If the ambient temperature is 25.0°C, what net power does the ball radiate? W
54. || The air temperature and pressure in a laboratory are 20°C and 1.0 atm. A 1.0 L container is open to the air. The container is then sealed and placed in a bath of boiling water. After reaching thermal equilibrium, the container is opened. How many moles of air escape?
A 60.0-kg runner expends 359 W of power while running a marathon. Assuming 12.5% of the energy is delivered to the muscle tissue and that the excess energy is removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per hour. (At 37.0°C the latent heat of vaporization of water is 2.41 ✕ 106 J/kg.) cm3
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