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Questions in physics

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - The distance versus time plot for a particular object shows a quadratic relationship. Which column of distance data is possible for this situation? | Time (s) | A. Distance (m) | B. Distance (m) | C. Distance (m) | D. Distance (m) | E. Distance (m) | |---|---|---|---|---|---| | 0 | 0 | 2.00 | 9.00 | | | | 1 | 1.00 | 4.00 | 18.00 | 1.00 | 1.00 | | 2 | 4.00 | 6.00 | 27.00 | 0.50 | 0.25 | | 3 | 9.00 | 8.00 | 36.00 | 0.33 | 0.11 | | 4 | 16.00 | 10.00 | 45.00 | 0.25 | 0.06 | | 5 | 25.00 | 12.00 | 54.00 | 0.20 | 0.04 | | 6 | 36.00 | 14.00 | 63.00 | 0.16 | 0.02 | A. column A B. column B C. column C D. column D E. column E

📝 Answered - Select the correct answer. Based on the law of conservation of energy, which statement is correct? A. Energy is always being added to all parts of the Universe. B. Energy is often destroyed in some parts of the Universe. C. Energy in a closed system cannot change forms. D. Energy in an isolated system remains constant.

📝 Answered - Power supply. Which line represents the motion of the cathode ray in an electric field?

📝 Answered - Select the correct answer. What is the force of gravity between Earth (mass $=6.0 \times 10^{24}$ kilograms) and Jupiter (mass $=1.901 \times 10^{27}$ kilograms)? The distance between the two planets is about $7.5 \times 10^{11}$ meters. A. $2.027 \times 10^{17}$ newtons B. $1.010 \times 10^{19}$ newtons C. $1.352 \times 10^{12}$ newtons D. ........10. E. $1.54 \times 10^{19}$ newtons

📝 Answered - Select the correct answer. A car moving with a velocity of 20 meters/second has [tex]$1.8 \times 10^5$[/tex] joules of kinetic energy. What is the mass of the car? A. [tex]$4.6 \times 10^2$[/tex] kilograms B. [tex]$9.0 \times 10^2$[/tex] kilograms C. [tex]$1.0 \times 10^3$[/tex] kilograms D. [tex]$1.2 \times 10^3$[/tex] kilograms

📝 Answered - Select the best answer for the question. 16. Which statement accurately describes a P wave? A. A P wave travels more slowly than an S wave. B. A P wave can move through solid rock only. C. A P wave moves particles up and down or side to side. D. A P wave can travel through liquids.

📝 Answered - On April 11, 2012, two earthquakes were measured off the northwest coast of Sumatra. The first had a magnitude of 8.6. The second had a magnitude of 8.2. By what approximate factor was the intensity of the first earthquake greater than the intensity of the second earthquake? [tex]M=\log \left(\frac{1}{t_0}\right)[/tex] [tex]M=[/tex] the magnitude of an earthquake I = the intensity of an earthquake [tex]f_0=[/tex] the smallest seismic activity that can be measured, which is 1 A. 0.40 B. 1.02 C. 1.05 D. 2.51

📝 Answered - What distinguishes a meteorite from a terrestrial rock? A. A meteorite has a high iron content. B. A meteorite has a dark crust formed when it burned in the air. C. A meteorite has unusual ratios of rare gases. D. All the above are characteristics of meteorites.

📝 Answered - How many orbits has Pluto completed around the Sun since we discovered it? A. More than 85, since it was discovered in 1930 B. About 248 since its orbital period is 248 years C. None, it is still on the same orbit as when it was discovered D. We have not seen it long enough to have figured it out