A fully charged parallel-plate capacitor remains connected to a battery while you slide a dielectric between the plates. What happens to the value of Q?
1.It increases.
2.It decreases.
3.It stays the same.
1
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If telescope A is 160 cm in diameter, and telescope B is 32 cm in diameter, how much more light does telescope A gather than telescope B?
a. 5 times b. 10 times c. 20 times d. 25 times e. 100 times
A fixed amount of ideal gas goes through a process abc. In state a, the temperature of the gas is 152°C, its pressure is 1.25 atm, and it occupies a volume of 0.250 m3
It then undergoes an isothermal expansion to state b that doubles its volume, followed by an isobaric compression back to its original volume at state c. (Hint: First show this process on a pV diagram.) The ideal gas constant is 8.314 J/mol ? K, and 1.00 atm = 1.01 × 105 Pa. (a) How many moles does this gas contain? (b) What is the change in the internal energy of the gas between states a and b? (c) What is the net work done on (or by) this gas during the entire process? (d) What is the temperature of the gas in state c?
Waves on a String: Transverse waves travel at 43.2 m/s in a string that is subjected to a tension of 60.5 N. If the string is 15.9 m long, what is its mass?
A. 0.515 kg B. 0.216 kg C. 0.366 kg D. 0.597 kg
A compound resulting from a major fuel impurity is
a. CO2. b. CO. c. SO2. d. HC.