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Citrus2011 [14]
3 years ago
5

Imagine that two charged objects are the system of interest. When the objects are infinitely far from each other, the electric p

otential energy of the system is zero. When the objects are close to each other, the electric potential energy is positive. Which of the following statements is(are) incorrect
(a) Both objects are positively charged.
(b) Both objects are negatively charged.
(c) One object is negatively charged and the other one is positively charged.
Physics
1 answer:
podryga [215]3 years ago
5 0

Answer: Option (c) is the correct answer.

Explanation:

It is known that the expression for potential energy related to charges and distance between their separation is as follows.

           U_{q} = \frac{kq_{1}q_{2}}{r}  

where,   q_{1} and q_{2} are two charges

                r = distance of separation between the charges

               k = electrostatic constant

So, when both the charges are carry the same charge and r is small then the value of potential energy will be positive in nature.

Whereas if the distance of separation between the charges is infinitely large then the potential energy calculated will be zero everywhere.

Thus, we can conclude that the statement one object is negatively charged and the other one is positively charged, is incorrect.

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adoni [48]

Group of answer choices.

A. Community and Forum Resources.

B. Get Live Help.

C. Tech Specs.

D. Top Support Issues.

Answer:

A. Community and Forum Resources.

Explanation:

Microsoft is a multinational corporation that designs and develops various types of software applications or programs such as Microsoft operating system (OS), Microsoft Word, Microsoft Excel, Microsoft Access, Microsoft PowerPoint, etc., to avail end users the ability to perform different tasks on their computers.

Whenever these users encounter a problem with any of these software applications or programs, they can easily go to the official forums and communities to get help from professionals and other end users who may have experienced such problems in the past. These community and forums are typically interactive in nature and as such serves its purpose often times.

Hence, Microsoft users can browse forums by topic, search existing questions and answers, or ask their own questions on Community and Forum Resources.

3 0
4 years ago
A 6.00-kg crate is suspended from the end of a short vertical rope of negligible mass. An upward force F(t) is applied to the en
timofeeve [1]

Answer:

The magnitude of F when t=4 s=146.64 N

Explanation:

We are given that

Mass of crate,m=6.00 kg

Height of crate above its initial position is given by

y(t)=(2.80 m/s)t+(0.610 m/s^3)t^3

We have to find the magnitude of F when t=4.00 s

Differentiate w.r.t t

\frac{dy}{dt]=2.8+3(0.61)t^2

\frac{d^2y}{dt^2}=6(0.61)t

a(t)=\frac{d^2y}{dt^2}=6(0.61)t m/s

a(4)=6(0.61)(4)=14.64 m/s^2

Now, magnitude of force

F=m(a+g)=6(14.64+9.8)=146.64N

Hence, the magnitude of F when t=4 s=146.64 N

4 0
3 years ago
What are the two applications of electron beam welding
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First of all, there are not <u>just</u> two applications that are solely applicable to the electron beam welding process. There are MANY.

Please visit out website at the URL below and you can click the "View Application" button under each  listed Industry segment to view case studies of commonly EB welded applications.

https://www.ptreb.com/electron-beam-welding-applications

And for more general information on our welding process, we have an informational section you can peruse as well:

https://www.ptreb.com/electron-beam-welding-information

Good luck with your assignment-  we are glad to hear they are teaching about EBW in high school!!!

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3 years ago
Write 3 – 4 sentences predicting the changes in electrostatic force, strong nuclear force, and the stability of a nucleus if the
mrs_skeptik [129]

Electrostatic force arises due  the charges at rest.In a isolated atom there is three fundamental particles called electron,proton and neutron.the electron is negatively charged,proton is positively charged and the neutron is neutral.

Generally the force between electron and proton is attractive,there will be also repulsion between proton and proton.due to the strong nuclear forces atom main its stability In an stable atom the the neutron to proton ratio lies between 1 to 1.42.if the number of neutrons are increased more,the stability will be hampered resulting the decrease in nuclear force also.

As neutron is neutral,there will be no change in the electrostatic forces as there is no increment of charge.but when the neutron number is increased at that time the binding energy per nucleon is decreased which in turn affects the nuclear force which is a  short range force.the nucleus becomes heavy and unstable which undergoes decay.

one thing we have to remember also that the nuclear force is spin dependent .so the change in neutron number affects the strong nuclear force which is the reason for its decrement.

8 0
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bagirrra123 [75]
You need to know the mass number to work it out. I can see you have it but it's not visible on your photo.

Every proton weighs 1 and every neutron weighs 1 so if you know the total mass of the nucleus and the number of protons, then you can do:
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because the rest of the mass (that isn't from the protons) must come from the neutrons. Make sense?
3 0
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