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Physics : Recent Questions and Answers (Page 50)

Find answers to your questions about Physics or help others by answering their Physics questions.

Reaction of radiation with Nitrogen-14

When solar wind brings high energy neutrons into contact with Nitrogen-14, a well known process occurs yielding Carbon-14 + a proton. N14 is assumed to exist in upper atmosphere as...

Asked on 10/02/2021

1 answer

Can a Skydiver Land On a Large Slide and Survive?

Please forgive my lack of artistic ability, but here's my question:Consider that a...

Asked on 10/02/2021 by MegaMark

6 answer

Is there any friction between wheel and road?

Human beings invented the wheel to get rid of the friction between the wheel and the road. But were we able to reduce it to zero? Is there any residual...

Asked on 10/02/2021 by hkBattousai

5 answer

Contradiction between law of conservation of energy and law of conservation of momentum?

Yesterday, while studying a simple question, a rather strange doubt hit my mind:Consider a ball of mass $m$ moving with velocity $v$ that collides with a wall in a perfectly...

Asked on 10/02/2021 by user375072

4 answer

In car driving, why does wheel slipping cause loss of control?

When driving a car on ice, there is a danger of slipping, thereby losing control of the car. I understand that slipping means that as the wheels rotate, their circumference...

Asked on 10/02/2021

6 answer

Can we use the electrostatic force of repulsion to project object?

My question is very simple. Can we use electrostatic force of repulsion to project objects; By charging that object(movable) with the same charge to another static object (non moving) in...

Asked on 10/02/2021

1 answer

Why and how does negative velocity exist?

Why and how does negative velocity exist? I have read on the internet about negative velocity but I still don't understand how it can even exist since time is...

Asked on 10/02/2021 by Andrej Slavejkov

6 answer

Why doesn't the Earth accelerate towards us?

According to Newton's third law of motion that states that every action has an equal and opposite reaction. So, if the Earth exerts a gravitational pull on us (people) then...

Asked on 10/02/2021

8 answer

Feynman's random walk (6-3)

How does Feynman get to $D^2_{N-1}$? The expected value of $D^2_N$ for $N>1$ can be obtained from $D_{N−1}$. If, after $N−1$ steps, we have ...

Asked on 10/02/2021

1 answer

How does a bullet achieve its stability when fired?

As far as I know, darts, arrows, and airplanes have the center of gravity(CG) ahead of their center of pressure(CP) and often have fins at the rear to achieve stability....

Asked on 10/02/2021

1 answer

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