A metal wire has a resistance of 10.0 V at a temperature of 20.0°C. If the same wire has a resistance of 10.6 V at 90.0°C, what is the resistance of this wire when its temperature is 220.0°C?
1.0.700 V
2.9.66 V
3.10.3 V
4.13.8 V
5.6.59 V
2
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An uncharged spherical conducting shell surrounds a charge ?q at the center of the shell. Then charge +3q is placed on the outside of the shell. When static equilibrium is reached, the charges on the inner and outer surfaces of the shell are respectively
a. +q, ?q. b. ?q, +q. c. +q, +2q. d. +2q, +q. e. +3q, 0.
Pascal's Principle: The water pressure to an apartment is increased by the water company. The water enters the apartment through an entrance valve at the front of the apartment. Where will the increase in the static water pressure be greatest when no water is flowing in the system?
A. at a faucet close to the entrance valve B. at a faucet far from the entrance valve C. It will be the same at all faucets. D. There will be no increase in the pressure at the faucets.
The pulses from a pulsar are most likely coming from localized areas near the magnetic poles
Indicate whether the statement is true or false
When a source of sound approaches, measurements will show an increase in the sound's
1) speed, 2) frequency, 3) wavelength, 4) all of these, 5) none of these, and when a source of sound recedes, measurements will show an increase in the sound's 6) speed. 7) frequency. 8) wavelength. 9) all of these. 10) none of these.