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WITCHER [35]
3 years ago
14

Two condition required for work done​

Physics
1 answer:
mixas84 [53]3 years ago
5 0
1) There must be a force
2) There must be displacement
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We want to find how much charge is on the electrons in a nickel coin. Follow this method. A nickel coin has a mass of about 4.2
monitta

Answer:

The number of atoms is N = 4.37*10^{22} \ atoms

Explanation:

From the question we are told that

                 The mass of coin  is m_n = 4.2g

                   Number of atom in one mole = n =6.02*10^{23} \ atoms

                   Molar mass of nickel M = 57.8g

Now the relation to obtain the number of atom in  the  nickel coin is

                        N = \frac{Mass \ of Nickel\ coin}{Molar \ mass\ of nickel }  * No\ of\atoms \ in \ \ one\  mole\ of\ nickel

                           = \frac{4.2}{57.8}* 6.02*10^{23}

                           =4.37 *10^{22} atoms

                 

     

8 0
3 years ago
[7 pts] 1. Suppose that a car starts from rest, its engine providing an acceleration of 4 ft/s2 while air resistance provides 0.
kumpel [21]

Answer:

a) Initial Value Problem

dv/dt = 4 - 0.1v

v(0) = 0

b) solution to the IVP

v(t) = 40(1 - e^(-t/10))

c) Limiting velocity

Vo = 40 ft/s

Position of the car after 12 hours

X = 14,390 ft

Explanations:

The complete explanations of each of the sections contained in the question are in the files attached to this solution.

4 0
3 years ago
Is carbon a metal, nonmetal, or semi-metal
Vlada [557]

Answer: Non metal.

Explanation: Carbon has 4 electrons in it’s valence shell which makes it a metalloid but commonly it is considered as a non metal.

5 0
3 years ago
How was the evidence of the big bang called?
bogdanovich [222]
There are several main pieces of evidence<span> that support the </span>Big Bang<span> theory. One is the fact that the universe is expanding, proven with something </span>called<span>red shift. The second is something </span>called<span> cosmic microwave background radiation. The third is the abundance of different elements in the universe.</span>
5 0
3 years ago
Read 2 more answers
When a severe weather watch has been issued by the National Weather Service, what should you do?
Harman [31]

Answer:

Begin to prepare

Explanation:

Just took the test!

4 0
3 years ago
Read 2 more answers
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