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A physics student has a single-occupancy dorm room. The student has a small refrigerator that runs with a current 1 A, a lamp that contains a 100-W bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 4 W. All the appliances run on a voltage of 110 V. Overall Hint a. What is the total power used by the dorm room (while the refrigerator runs)? Total power used by the dorm room is 274 b. Assuming that the power plant for the electricity is 19 km away and uses 000-gauge copper wire (diameter 10.405 mm), how much power is dissipated in transmission (remember to count the return wire), if the power plant is directly providing the 110-V? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the dorm room is 110 V.) Hint for part (b) Power of 46.54 W is dissipated in transmission at 110 V. c. The most common way to increase the efficiency of power transmission is by using higher voltage for long-distance transmission (and it is "down transformed" nearer the consumers of electricity). Assuming that the same amount of power calculated in (a) is transmitted, how much power is dissipated in transmission, if the power plant provides the power at 110 kV? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the transformer station is 110 kV.) Hint for part (c) ✔W. Power of W is dissipated in transmission at 110 kV.

A physics student has a single-occupancy dorm room. The student has a small refrigerator that runs with a current 1 A, a lamp that contains a 100-W bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 4 W. All the appliances run on a voltage of 110 V. Overall Hint a. What is the total power used by the dorm room (while the refrigerator runs)? Total power used by the dorm room is 274 b. Assuming that the power plant for the electricity is 19 km away and uses 000-gauge copper wire (diameter 10.405 mm), how much power is dissipated in transmission (remember to count the return wire), if the power plant is directly providing the 110-V? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the dorm room is 110 V.) Hint for part (b) Power of 46.54 W is dissipated in transmission at 110 V. c. The most common way to increase the efficiency of power transmission is by using higher voltage for long-distance transmission (and it is "down transformed" nearer the consumers of electricity). Assuming that the same amount of power calculated in (a) is transmitted, how much power is dissipated in transmission, if the power plant provides the power at 110 kV? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the transformer station is 110 kV.) Hint for part (c) ✔W. Power of W is dissipated in transmission at 110 kV.

College Physics
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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Can I please get help for part C in the first picture, and all of second picture. Please and thank you!
2 Consider two positive charges Q1 and Q2 of the same magnitude 8.5 µC symmetrically placed on the x-axis at x = 12 cm. Consider a third positive charge Q3 of magnitude 8 µC and mass 2.5 g moving along the y- axis. Where applicable, let the potential energy be zero when charges are very far apart from each other. Hint a. What is the potential energy of Q3 when it is at y = 3 cm? Hint for (a) # 3 E D PEQ3= b. If Q3 is released from rest at y = 3 cm, how fast is it moving when it reaches y = 7.8 cm? Question Help: Message instructor Submit Question F3 C Hint for (b) VQ3 80 4 R F 888 F4 V 25 % J. m/s. F5 G ^ 6 B MacBook Air F6 Y H & 7 N Ad F7 U 00 8 J DII FB 1 M ( 0 9 K DD F9 O ) O V- H L F10 | 1 P F11
Transcribed Image Text:2 Consider two positive charges Q1 and Q2 of the same magnitude 8.5 µC symmetrically placed on the x-axis at x = 12 cm. Consider a third positive charge Q3 of magnitude 8 µC and mass 2.5 g moving along the y- axis. Where applicable, let the potential energy be zero when charges are very far apart from each other. Hint a. What is the potential energy of Q3 when it is at y = 3 cm? Hint for (a) # 3 E D PEQ3= b. If Q3 is released from rest at y = 3 cm, how fast is it moving when it reaches y = 7.8 cm? Question Help: Message instructor Submit Question F3 C Hint for (b) VQ3 80 4 R F 888 F4 V 25 % J. m/s. F5 G ^ 6 B MacBook Air F6 Y H & 7 N Ad F7 U 00 8 J DII FB 1 M ( 0 9 K DD F9 O ) O V- H L F10 | 1 P F11
# A physics student has a single-occupancy dorm room. The student has a small refrigerator that runs with a current 1 A, a lamp that contains a 100-W bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 4 W. All the appliances run on a voltage of 110 V. Overall Hint a. What is the total power used by the dorm room (while the refrigerator runs)? Total power used by the dorm room is 274 b. Assuming that the power plant for the electricity is 19 km away and uses 000-gauge copper wire (diameter 10.405 mm), how much power is dissipated in transmission (remember to count the return wire), if the power plant is directly providing the 110-V? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the dorm room is 110 V.) Hint for part (b) # 3 E Power of 46.54 W is dissipated in transmission at 110 V. c. The most common way to increase the efficiency of power transmission is by using higher voltage for long-distance transmission (and it is "down transformed" nearer the consumers of electricity). Assuming that the same amount of power calculated in (a) is transmitted, how much power is dissipated in transmission, if the power plant provides the power at 110 kV? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the transformer station is 110 kV.) Hint for part (c) Power of Question Help: Message instructor Submit Question 80 F3 54 $ 4 R F4 67 5⁰ % 5 F5 T W is dissipated in transmission at 110 kV. ^ 6 F6 ✓W. Y & 7 F7 U * CO 8 DII F8 ( 9 DD F9 O ) F10
Transcribed Image Text:# A physics student has a single-occupancy dorm room. The student has a small refrigerator that runs with a current 1 A, a lamp that contains a 100-W bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 4 W. All the appliances run on a voltage of 110 V. Overall Hint a. What is the total power used by the dorm room (while the refrigerator runs)? Total power used by the dorm room is 274 b. Assuming that the power plant for the electricity is 19 km away and uses 000-gauge copper wire (diameter 10.405 mm), how much power is dissipated in transmission (remember to count the return wire), if the power plant is directly providing the 110-V? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the dorm room is 110 V.) Hint for part (b) # 3 E Power of 46.54 W is dissipated in transmission at 110 V. c. The most common way to increase the efficiency of power transmission is by using higher voltage for long-distance transmission (and it is "down transformed" nearer the consumers of electricity). Assuming that the same amount of power calculated in (a) is transmitted, how much power is dissipated in transmission, if the power plant provides the power at 110 kV? (To be more precise, the power plant is providing the voltage it needs to provide, so that the voltage at the transformer station is 110 kV.) Hint for part (c) Power of Question Help: Message instructor Submit Question 80 F3 54 $ 4 R F4 67 5⁰ % 5 F5 T W is dissipated in transmission at 110 kV. ^ 6 F6 ✓W. Y & 7 F7 U * CO 8 DII F8 ( 9 DD F9 O ) F10
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