Recent questions in Physics

+21 votes

0 answers

Today I watched a video of a guy measuring ambient temperature with an infrared thermometer pointing it at the air. Does it actually work or is it measuring the radiation from the closest object?

asked Feb 15, 2023 in Physics by oracleoftech (2.0k points)

+11 votes

0 answers

Why can't objects without mass go faster than the speed of light?

asked Feb 15, 2023 in Physics by Moto Slug

+7 votes

0 answers

Can anything exist forever?

asked Feb 15, 2023 in Physics by SeraphicOracle

+51 votes

0 answers

How can one prove that the Carnot cycle has the maximum efficiency of converting heat into work?

asked Feb 15, 2023 in Physics by davnav

+3 votes

0 answers

What are the Kelvin and Celsius temperature scales based on?

asked Feb 15, 2023 in Physics by tobydog

+1.2k votes

0 answers

A baseball is thrown a distance of 55m. What is its speed if it takes 0.45s to cover the distance?

asked Feb 15, 2023 in Physics by nakedterry

+16 votes

0 answers

What is Newton's law? Is it still used as a scientific law or has it been replaced by other theories/laws, and if so, why was it considered true at one point in time but not anymore?

asked Feb 15, 2023 in Physics by 8768b

+24 votes

0 answers

What is an experiment to determine the density of an irregular solid (e.g., stone)?

asked Feb 14, 2023 in Physics by Kaboo

+233 votes

0 answers

What are the benefits of doing an MSc in physics for a doctor?

asked Feb 14, 2023 in Physics by Ay Bee Cee

+70 votes

0 answers

If we built bridges between planets, what would happen?

asked Feb 14, 2023 in Physics by Aged P

+89 votes

0 answers

If an astronomical object was so remote that it was no longer within the gravitational field of any other object, would it be motionless?

asked Feb 14, 2023 in Physics by Matt Blandford

+14 votes

0 answers

If every atom of my body has existed since, or shortly after, the Big Bang, where do the 'extra' atoms needed for my body to grow come from? For example, does my body create hydrogen like stars do?

asked Feb 14, 2023 in Physics by MysticOracle

+17 votes

0 answers

Will time travel ever be possible? If so, is there more than one dimension?

asked Feb 14, 2023 in Physics by AstralEnigma (2.9k points)

+97 votes

0 answers

How fast can humans swim?

asked Feb 14, 2023 in Physics by nmlyons31

+11 votes

0 answers

Is obscurity a form of entropy?

asked Feb 14, 2023 in Physics by NovaPulse

+100 votes

0 answers

Can you explain how to use Einstein's field equation to calculate something?

asked Feb 14, 2023 in Physics by Little Ern

+131 votes

0 answers

If the Earth is rotating at a high speed, why doesn't the rotational motion cause extreme wind speeds at the equator?

asked Feb 14, 2023 in Physics by CelestialTwilight

+20 votes

0 answers

What will happen to the moment of inertia of a cylinder if the axis of diameter is doubled?

asked Feb 14, 2023 in Physics by twr88

+20 votes

0 answers

How useful would it be if intersections were intentionally elevated? Instead of the usual energy loss of braking and accelerating would now be temporarily stored in/released from gravitational energy. I guess less useful for hybrid and electric cars.

asked Feb 14, 2023 in Physics by N1ckarla

+19 votes

0 answers

A cannon ball is shot with initial velocity 141.4 m s' with 45 angle of inclination. What is the position and velocity of the cannon ball at 5 s?

asked Feb 14, 2023 in Physics by P F Hammer (2.8k points)

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