A fan that consumes 20 W of electric power when operating is claimed to discharge air from a ventilated room at a rate of 1.0 kg/s at a discharge velocity of 8 m/s. Determine if this claim is reasonable.
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A fan that consumes 20 W of electric power when operating is claimed to
discharge air from a ventilated room at a rate of 1.0 kg/s at a discharge
velocity of 8 m/s. Determine if this claim is reasonable.
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- How much work is done on the gas in the process shown, in Joule?The first Law of thermodynamics is applied to an ideal gas that is then taken through an isobaric process. Is work done by the gas?One mole of an ideal gas initially at a temperature of T, = 8.4°C undergoes an expansion at a constant pressure of 1.00 atm to eight times its original volume. (a) Calculate the new temperature T,of the gas. K. (b) Calculate the work done on the gas during the expansion. kJ
- When the volume of an ideal gas stays the same, which of the followings must be true? Select all apply.Consider the process shown in (Figure 1). How much work is done on the gas in this process? p (kPa) 400- 200- i 0 0 100 200 300 V (cm³)An ideal monatomic gas is contained in a vessel of constant volume 0.220 m3. The initial temperature and pressure of the gas are 300 K and 5.00 atm, respectively. The goal of this problem is to find the temperature and pressure of the gas after 29.0 kJ of thermal energy is supplied to the gas. (a) Use the ideal gas law and initial conditions to calculate the number of moles of gas in the vessel. mol (b) Find the specific heat of the gas. /K (c) What is the work done by the gas during this process? kJ (d) Use the first law of thermodynamics to find the change in internal energy of the gas. kJ (e) Find the change in temperature of the gas. K (f) Calculate the final temperature of the gas. K (g) Use the ideal gas expression to find the final pressure of the gas.
- Five moles of gas initially at a pressure of 2.00 atm and a volume of 0.300 L has internal energy equal to 91.0 J. In its final state, the gas is at a pressure of 1.50 atm and a volume of 0.800 L, and its internal energy equals 182 J. P (atm) 2.00 -- 1.50 V (liters) 0.300 0.800 (a) For the paths IAF, IBF, and IF in the figure above, calculate the work done on the gas. 75,99 WIAF= The response you submitted has the wrong sign. J 101.325 The response you submitted has the wrong sign. J 88.65 w, VIBF WIE The response you submitted has the wrong sign. JLiquid helium has a very low boiling point, 4.2 K, as well as a very low latent heat of vaporization, 2.00 104 J/kg. If energy is transferred to a container of liquid helium at the boiling point from an immersed electric heater at a rate of 19.0 W, how long does it take to boil away 2.30 kg of the liquid? _________________minD,e,f