When electrical energy is used to turn on a light bulb, the conversion from electrical energy...
When electrical energy is used to turn on a light bulb, the conversion from electrical energy to light energy is not 100% efficient. This loss of usable energy can be explained by
(a) a destruction of energy
(b) the second law of thermodynamics
(c) the first law of thermodynamics
(d) a conversion to potential energy
(e) none of the above
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When electrical energy is used to turn on a light bulb, the
conversion from electrical energy...
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 o...
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...
Two light bulbs are placed side by side. The first light bulb emits red light of...
Two light bulbs are placed side by side. The first light bulb emits red light of wavelength 700 nm, and the second light bulb emits violet light of wavelength 400 nm. (a) Fill in the blanks in each of the following statements with the word greater, the word smaller, the phrase the same, or the phrase don’t know. (i) Compared to the photons of red light, the photons of violet light have __________ frequency. (ii) Compared to the photons of...
45. What is the matemathical relationship between potential energy (PE) and kinetic energy (KE)? a. They...
45. What is the matemathical relationship between potential energy (PE) and kinetic energy (KE)? a. They are directly proportional b. They are inversely proportional c. Their sum is equal to the total internal energy of the system (E) d. Both B and C are correct e. None of the above 46. What is a consequence of the 1 Law of Thermodynamics? a. The energy of a system can never change b. The energy of the surroundings can never change c....
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d. (4 Points)A photovoltaic cell converts light into electrical energy. Suppose a certain photovoltaic cell is only 43.5% efficient, in other words, that 43.5% of the light energy is ultimately recovered. If the energy output of this cell is used to heat water, how many 512 nm photons must be absorbed by the photovoltaic cell in order to heat 10.0 g of water from 20.0°C to 30.0°? 07 The specific heat of water is 4.184 J/g-"C.
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- A circuit with an equivalent resistance of 5.0 uses 125 J of energy each second....
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2. A string of lights is wired in a series circuit. When one light bulb ns...
2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will be lit. C D e burnt out bulb becomes a fire hazard. all of the other bulbs will be lit. 2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will...
6. A circuit with an equivalent resistance of 5.0 2 uses 125 J of energy each...
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Energy carried by an EM wave coming through the air can be used to light a...
Energy carried by an EM wave coming through the air can be used to light a bulb that is not connected to a battery or plugged into an electric outlet. Suppose a receiving antenna is attached to a bulb and the bulb is found to dissipate a maximum power of 1.05 W when the antenna is aligned with the electric field coming from a distant source. The wavelength of the source is large compared to the antenna length. When the...
14) According to the law of reflection, a light ray striking a mirror at an angle...
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45. What is the matemathical relationship between potential energy (PE) and kinetic energy (KE)? a. They are directly proportional b. They are inversely proportional c. Their sum is equal to the total internal energy of the system (E) d. Both B and C are correct e. None of the above 46. What is a consequence of the 1 Law of Thermodynamics? a. The energy of a system can never change b. The energy of the surroundings can never change c....
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- A circuit with an equivalent resistance of 5.0 uses 125 J of energy each second. What voltage is used to power this circuit? a) 5 V b) 15 V c) 25 V d) 45 V e) 625 V Two cylindrical resistors, A and B, are made from two different materials and have the same resistance. Resistor A has a conductivity of A = 10 03. The resistors are manufactured with the same length. The radius of Resistor A (A)...
2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will be lit. C D e burnt out bulb becomes a fire hazard. all of the other bulbs will be lit. 2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will...
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