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sashaice [31]
3 years ago
12

How Fast Is Lightning?

Physics
1 answer:
Digiron [165]3 years ago
8 0
The return stroke (the current that cause the visible flash) moves upward at a speed of about 320,000,000 ft per second or about 220,000,000 miles per hour (about 1/3 the speed of light).
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How many amps are there in the current of a circuit if the voltage source is 140v and the resistance is 2 ohms?
VLD [36.1K]
Voltage (V)= Current (I) * Resistance (R)
I=V/R=140/2=70A

Hope this helps!
7 0
3 years ago
A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 2.90 seconds fo
Natasha_Volkova [10]
We'll assume that the whole scene takes place on Earth.
So the acceleration of gravity is 9.8 m/s² downward.

a).  Gravity makes anything fall 9.8 m/s faster every second.
That's the same thing as rising 9.8 m/s slower every second.

If it takes 2.9 seconds to reach its maximum height, then
it must have started out rising at (9.8 x 2.9) = 28.4 m/s.

b).  The ball left the bat at 28.4 m/s.
After 2.9 seconds, its speed was zero. (That's why it started falling.)
It's average speed during the climb was

                 1/2 (28.4 + 0)  =  14.2 m/s .

It rose straight up at an average speed of 14.2 m/s for 2.9 seconds,
so it reached a maximum  height of

                 (14.2 x 2.9)  =   41.2 meters    .   
4 0
3 years ago
Which of the following is associated with fusion but not fission?
MArishka [77]

C. Uranium

Explanation:

Uranium is not associated with nuclear fusion process. Uranium serves as fuels in the process of nuclear fission.

  • Nuclear fusion is the combination of small atomic nuclei into larger ones with the release of large amount of energy .
  • Nuclear fusion involves the lightest nuclei such as hydrogen. The products are also not heavy isotopes.
  • But in nuclear fission, heavy and unstable radionuclides are involved like uranium and lead.

Learn more:

Transmutation brainly.com/question/3433940

#learnwithbrainly

3 0
3 years ago
Read 2 more answers
You launch a model rocket that has a mass of 2 kg. At a height of 400 m, it is traveling at 150 m/s. What is its kinetic energy
Feliz [49]

Explanation:

KE = ½ mv²

KE = ½ (2 kg) (150 m/s)²

KE = 22,500 J

3 0
3 years ago
Question 5- A gas occupies 60 liters at a pressure of 40.0 mm Hg. What is the volume when the pressure is
shtirl [24]

Answer:

40L

Explanation:

Data obtained from the question include:

V1 (initial volume) = 60L

P1 (initial pressure) = 40mmHg

V2 (final volume) =?

P2 (final pressure) = 60mmHg

Using P1V1 = P2V2, the final volume can be obtain as illustrated below:

P1V1 = P2V2

40 x 60 = 60 x V2

Divide both side by 60

V2 = (40 x 60)/60

V2 = 40L

Therefore, the final volume is 40L

3 0
4 years ago
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