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Questions in physics

📝 Answered - Colder temperatures tend to increase the air pressure in tires. True False

📝 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 [tex]$A$[/tex] B. column B C. column C D. column D E. column E

📝 Answered - L = loudness, in decibels $(dB); I =$ sound intensity, in watts $/ m ^2 ; I_0=10^{-12}$ watts $/ m ^2$ The loudness of a jack hammer is 96 dB. Its sound intensity is about $\square$ The loudness of a compactor is 94 dB. Its sound intensity is about $\square$

📝 Answered - What information is needed to calculate momentum? A. velocity B. mass and velocity C. mass D. neither mass nor velocity

📝 Answered - (b) An object is set 20 cm in front of a lens, and a real, inverted, magnified image is formed at a great distance. State the type of lens used and determine the value of the focal length.

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

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

📝 Answered - How are current and resistance related when the voltage of a circuit is constant? A. The current doubles when the resistance doubles because they are directly proportional. B. The current doubles when the resistance doubles because they are inversely proportional. C. The current is cut in half when the resistance doubles because they are directly proportional. D. The current is cut in half when the resistance doubles because they are inversely proportional.

📝 Answered - Aluminum 0.897 Soil 0.80 Granite 0.790 Iron 0.450 Copper 0.385 Silver 0.233 Lead 0.129 A. 4.485 J B. 2691 J C. $13,455 J$ 0.13455 .1