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Lunna [17]
3 years ago
9

Electric circuits and electric current

Physics
1 answer:
lidiya [134]3 years ago
6 0

an electric current is a flow of electric charge in electric circuits this is carried by moving electrons in a wire and an electric circuit is an electrical network of electrical components and model of interconnection consisting electrical elements

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This is a velocity versus time graph of a car starting from rest. If the area under the line is 10 meters: what is the correspon
shtirl [24]

Answer: The correct answer is option (D).

Explanation:

The area under the line is 10 meters that is displacement which means that area enclosed by the right angled triangle is 10 unit squares.

So, the it can be written as:

\text{area of triangle}=\frac{1}{2}\times velocity\times time

10=\frac{1}{2}\times 2.0 m/s\times time

time =10 seconds

Hence the, the correct answer is option (D).

6 0
3 years ago
A 1.8 kg book had been dropped from the top of the football stadium. It's speed is 4.8 m/s when it is 2.9 meters above the groun
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Answer:

72.936 Joule

Explanation:

Mechanical Energy = Potential Energy + Kinetic Energy

Kinetic Energy = (1/2) x m x V² = (1/2) x 1.8 x 4.8² = 20.736 J

Potential Energy = m x g x h = 1.8 x 10 x 2.9 = 52.2 J

Total Mechanical Energy = 20.736 + 52.2 = 72.936 Joule

4 0
3 years ago
Please Help!!!!!! What is the acceleration of a car between 2 and 5 seconds? Hint: Acceleration is a change in speed and directi
Ghella [55]

Answer : B.  0 m/s∧2

Now we know that velocity = distance/ time

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From the graph we see that at the time interval 5 secs,the distance travelled is 25 m. Hence the velocity (v2) =25/5 = 5m/s.

Now acceleceration between the time interval of 2 ad 5 secs is calculated as

(v1-v2)/t2-t1 = (5-5)/(5-2) = 0 m/s∧2

5 0
3 years ago
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Answer:

D. A difference in resistance

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A pycnocline is a boundary between changing regions of which of the following properties? What about a thermocline?
seropon [69]
The answer is <span>temperature, salinity
Hope this helps. :)</span>
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3 years ago
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