If we use 67 W of power to heat 148 g of water, how long will it take to raise the temperature of the water from 15°C to 25°C?
The specific heat of water is 4190 J/kg•K.
A) 93 s
B) 5.3 s
C) 22 s
D) 114 h
A
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RLC Circuits: A 120-V rms voltage at 60 Hz is applied across a series combination of a 20-?F capacitor and an unknown resistor. If the rms value of the current in the circuit is 0.60 A, what is the resistance of the resistor?
A. 60 ? B. 120 ? C. 180 ? D. 150 ? E. 200 ?
Wire A has a diameter half that of B but is otherwise identical. The electric field acting in each has the same magnitude. How do the currents flowing through these two wires compare?
F. Other (specify)
T. It is impossible to say given the provided information
What is the importance of the carbon dioxide (CO2 ) cycle?
A) It makes the growth of continents possible. B) It allows for an ultraviolet-absorbing stratosphere. C) It regulates the carbon dioxide concentration of our atmosphere, keeping temperatures moderate. D) It will prevent us from suffering any consequences from global warming.
Consider the following reaction. ?+ + n ? ?– + p This reaction is impossible because it violates which conservation law?
a. baryon number b. lepton number c. strangeness d. charge e. two of the above