Recent questions in Physics

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How does knowledge of physics impact the petroleum industry?

asked Aug 17, 2022 in Physics by DBCDIY

+22 votes

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Does negative energy exist? If so, can it be absorbed by a crystal or water, and if so, how does it happen?

asked Aug 17, 2022 in Physics by justj (2.5k points)

+21 votes

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How do you calculate the position from velocity or speed alone?

asked Aug 16, 2022 in Physics by billathome65

+123 votes

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If gravity is the dominant force responsible for keeping the atmosphere in place on a spherical Earth, how do we account for the phenomenon of Earth's atmosphere extending well beyond what gravity alone could retain?

asked Aug 16, 2022 in Physics by tricky13

+217 votes

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If the Earth is a sphere, why is it that the horizon always appears at eye level no matter how high we ascend? Shouldn't we observe a noticeable downward curve?

asked Aug 16, 2022 in Physics by Copper Dragon

+17 votes

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Does the pressure vary between the main pipe and its branches?

asked Aug 16, 2022 in Physics by owen

+82 votes

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Given that the density of water = 1gm/cm3, then what does the mass of 100 M3 of water come out to be?

asked Aug 16, 2022 in Physics by 1rocky1

+53 votes

0 answers

Why can't photons have reference frames?

asked Aug 16, 2022 in Physics by MysticOracle

+52 votes

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How does the number of turns of coil affect the induced EMF?

asked Aug 16, 2022 in Physics by Banker

+3 votes

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Do you know any good jokes about physics or chemistry?

asked Aug 16, 2022 in Physics by boris the blade

+11 votes

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What are our goals in physics and chemistry?

asked Aug 16, 2022 in Physics by BigTomorrow

+235 votes

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What is the Big Bang theory? Does it suggest that entropy was created or destroyed during the event? Where would you place our current state of entropy in relation to the Big Bang?

asked Aug 15, 2022 in Physics by SDAWEDFF

+9 votes

0 answers

What are the complementary sources of gamma rays?

asked Aug 15, 2022 in Physics by Muzungu

+21 votes

0 answers

What causes wind speed to drop at night?

asked Aug 15, 2022 in Physics by filmtechnique

+11 votes

0 answers

Who discovered velocity?

asked Aug 15, 2022 in Physics by Um

+1 vote

0 answers

What is the 1st law of thermodynamics?

asked Aug 15, 2022 in Physics by Shiam04

+94 votes

0 answers

Which ball will bounce higher, steel or rubber?

asked Aug 15, 2022 in Physics by MRY

+290 votes

0 answers

What is the mistake in the following example? If there is a cylindrical tube closed by pistons and has a gas inside in a vacuum, the gas starts to accelerating pistons thus converting thermal energy to mechanical, the total entropy decreases!

asked Aug 15, 2022 in Physics by SolarisWhirl

+5 votes

0 answers

How many electrons move through a headlight each second when a 12.0V car battery powers a single 30.0W headlight? How many electrons pass through it each second?

asked Aug 15, 2022 in Physics by Scott Haines

+8 votes

0 answers

Is friction quantized?

asked Aug 14, 2022 in Physics by 14th edition

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