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masya89 [10]
3 years ago
12

Question 9

Physics
1 answer:
MrRa [10]3 years ago
3 0

Answer: it means object initially possessed equal number of positive and negative charges.

Explanation:

Object looks uncharged when it's in neutral state. That's positive charge equals negative charge.

The moment the transfer of charges take place, one gains electron while the other loses electron.

The gainer of electron becomes negatively charged while the looser of electron becomes positively charged.

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What is the overall moment?
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A moment causes a rotation about or axis. If the moment is to be taken about a point due to a force F, then in order for a moment to develop, the line of action cannot pass through that point...... the total moment was zero because the moment arm was zero as well
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3 years ago
A 30.0 kg dolphin decelerates from 12.0 to 7.00 m/s in 2.60 s to join another dolphin in play. What average force (in N) was exe
Crazy boy [7]

Answer:

Force is 57.69 N to the opposite direction of motion of dolphin.

Explanation:

We have force is the product of mass and acceleration.

That is    

                 Force = Mass x Acceleration

                         F = ma

Mass of dolphin, m = 30 kg

We have equation of motion, v = u + at

Final velocity, v = 7 m/s

Initial velocity, u = 12 m/s

Time, t = 2.60 s

Substituting

                   7 = 12 + a x 2.6

                    a = -1.92 m/s²

Force,   F = 30 x -1.92 = -57.69 N

So the force is 57.69 N to the opposite direction of motion of dolphin.

7 0
3 years ago
Is a switch essential for a circuit to operate
antiseptic1488 [7]

Answer:

yes it is essential

Explanation:

a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit; controls current flow into a circuit

4 0
3 years ago
The half-life of cobalt-60 is 5.26 years. If 50 g are left after 15.8 years, how many
PtichkaEL [24]

Answer:

400 g

Explanation:

The computation of the number of grams in the original sample is shown below:

Given that

half-life = 5.26 years

total time of decay = 15.8 years

final amount = 50.0 g

Now based on the above information  

number of half-lives past is

=  15.8 ÷ 5.26

= 3 half-lives

Now

3 half-lives = 1 ÷ 8 remains = 50.0 g

So, the number of grams would be

= 50.0 g × 8

= 400 g

4 0
2 years ago
An english scientist created the first periodic table of elements
olga nikolaevna [1]
Like a then it would be A something I guess it goes like that
8 0
3 years ago
Read 2 more answers
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