Physics, 18.02.2020 04:22 jetblackcap
A sheet of mica is inserted between the plates of an isolated charged parallel-plate capaci- tor. Mica is a transparent mineral that comes naturally in thin sheets, and is an excellent dielectric. Which of the following statements is true? 1. The capacitance decreases. 2. The charge on the capacitor plates de- creases. 3. The electric field between the capacitor plates increases. 4. The energy of the capacitor does not change. 5. The potential difference across the capac- itor decreases 015 10.0 points In order to store more energy in a parallel- plate capacitor whose plates differ by a fixed voltage. what change would you make in the plates?
Answers: 1
Physics, 21.06.2019 22:50
An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?
Answers: 3
Physics, 23.06.2019 09:30
How many milliliters of water at 23 °c with a density of 1.00 g/ml must be mixed with 180 ml (about 6 oz) of coffee at 95 °c so that the resulting combination will have a temperature of 60 °c? assume that coffee and water have the same density and the same specific heat. how much will the temperature of a cup (180 g) of coffee at 95 °c be reduced when a 45 g silver spoon (specific heat 0.24 j/g °c) at 25 °c is placed in the coffee and the two are allowed to reach the same temperature? assume that the coffee has the same density and specific heat as water. a 45-g aluminum spoon (specific heat 0.88 j/g °c) at 24 °c is placed in 180 ml (180 g) of coffee at 85 °c and the temperature of the two become equal. (a) what is the final temperature when the two become equal? assume that coffee has the same specific heat as water. (b) the first time a student solved this problem she got an answer of 88 °c. explain why this is clearly an incorrect answer.
Answers: 1
A sheet of mica is inserted between the plates of an isolated charged parallel-plate capaci- tor. Mi...
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