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Andreyy89
3 years ago
7

2. The word used to represent a chemical reaction is a/an a. Atom b. Formula O c. Equation d. Symbol​

Physics
1 answer:
Slav-nsk [51]3 years ago
5 0

Answer:

A formula I am pretty sure

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Answer:

680 J

Explanation:

Mechanical energy = potential energy + kinetic energy

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ME = mgh + ½ mv²

ME = (77.1 kg) (9.8 m/s²) (0.90 m) + ½ (77.1 kg) (0 m/s)²

ME = 680 J

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3 years ago
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A battery is used to charge a parallel-plate capacitor, after which it is disconnected. Then the plates are pulled apart to twic
Igoryamba

Answer: C.

Explanation:

For a parallel-plate capacitor where the distance between the plates is d.

The capacitance is:

C = e*A/d

You can see that the distance is in the denominator, then if we double the distance, the capacitance halves.

Now, the stored energy can be written as:

E = (1/2)*Q^2/C

Now you can see that in this case, the capacitance is in the denominator, then we can rewrite this as:

E = (1/2)*Q^2*d/(e*A)

e is a constant, A is the area of the plates, that is also constant, and Q is the charge, that can not change because the capacitor is disconnected.

Then we can define:

K = (1/2)*Q^2/(e*A)

And now we can write the energy as:

E = K*d

Then the energy is proportional to the distance between the plates, this means that if we double the distance, we also double the energy.

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3 years ago
An Ohmic material is one in which its resistance does not depend on the voltage across it or the current within it. In that case
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Voltage

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3 years ago
The direction of centripetal force is away from the axis of rotation.
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I’m pretty sure it’s true x
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A flat horizontal surface with an area of 518 cm^2 is inside a uniform electric field of 1.33 x 10^4 N/C. The angle between the
GarryVolchara [31]

Answer: 576.48 N*m^2/C

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3 years ago
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