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Question 6 5 pts In room at 20°C, an incandescent light bulb is using 60 W...
In room at 20°C, an incandescent light bulb is using 60 W of electric power. The rate of entropy generated by the light bulb is most closely equal to:
Imagine that you turn on the lamp in your room that contains an incandescent light bulb and that you stand 1m from the light. Suppose further that your bulb is rated at 100 W. What is the intensity of the light that passes out through this sphere at this distance of say 1m? Now compare this to a milliwatt laser at the same distance away. How many times more/less intense is the laser beam to your eye compared to the...
Question 4 5 pts R134A at 30°C, 0.6 MPa is adiabatically throttled to 0°C, 0.2 MPa. The specific entropy generation is most closely equal to: O 0.2 kJ/kg-K O 0.0 kJ/kg-K 2.0 kJ/kg-K O 0.02 kJ/kg-K
Fig. 1. Logic circuit for Question 1 2. The 60 W light bulb shown in Fig. 2 is rated at 120 volts. Calculate the required supply voltage V, to make the light bulb operate at the rated conditions. (2 pts) 50 22 Bulb 3 802 Fig.2. Circuit for Question 2 (3 pts) 3. For the circuit shown in Fig. 3, using KVL & KCL: a. Determine the currents i1, 12 & 13 b. The voltage across the resistor R1, R2...
kWh BTU Question 10 5 pts A 300 W light bulb is turned on 3 hours every day. How much energy does it consume in one year in kwh? Question 1:1 5 pts The thermodynamic process performed by the condenser in a Carnot engine is Adiabatic compression
urgent,! please help, thank you Question 6 1 pts A light bulb with a resistance of 2982 draws 56 milliamps of current when attached to a 20 volt battery (i.e., the emf of the battery is 20 volts). What is the internal resistance of this battery? Answer in ohms to the nearest ohm. (1000 milliamps = 1 amp.)
Question 3 5 pts A spark is generated in an automobile spark plug when there is an electric potential of 3000 V across the electrode gap. If 75 W of power is generated in a single spark that lasts 100 ns, what is the instantaneous current across the gap? 0 5mA O 7.5 mA 12 mA O 25 mA O 32 mA Question 4 5 pts A green laser operating at 532 nm shines light onto two-closely spaced slits. An...
Question 3 5 pts A spark is generated in an automobile spark plug when there is an electric potential of 3000 V across the electrode gap. If it takes 100 ns for the spark to jump across the gap and the total charge that travels across the gap is 2.5 nC, what is the power generated by a single spark? O 10 W O 25 W 0 40W O 60 W O 75 W
Question 10 5 pts How many photons per second are emitted by a 5.5-W LED light bulb, if the emission is at a wavelength of 550 nm? 1.23E22 photons/s 5.07E21 photons/s 3.62E19 photons/s O 1.52E19 photons/s 0 4.27E19 photons/s
can you please answer these questions Question 11 0/5 pts Light of wavelength 495 nm is incident upon a single slit with width W = 4.3 x 10-4 m. The figure below shows the pattern observed on a screen positioned 270 cm from the slits. What is the distance, in cm. Please round your answer to two decimal places 0.000 Question 12 5/5 pts Question 18 0/3 pts The figure below shows the time variation of the magnitude of the...