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taurus [48]
3 years ago
8

a 120 ohm resistor, a 60 ohm resistor, and a 40 ohm resistor are connected in parallel to a 120 volt power source. what is the c

urrent running through the entire circuit?
Physics
1 answer:
Ber [7]3 years ago
3 0
Answer:
\frac{1}{r \: total} = \frac{1}{120} + \frac{1}{60} + \frac{1}{40} \\ \frac{1}{r \: total} = \frac{1 + 2 + 3}{120} = \frac{6}{120} = \frac{1}{20} \\ r \: total = 20 \: ohms
Knowing V=ri
then, 120=i×20 --> i=6 A
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Larry weighs 300 N at the surface of Earth. What is the weight of Earth in the gravitational field of Larry
Setler [38]

The gravitational force of attraction between two objects is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them.

F = \frac{GMm}{r^2}

Where,

G = Gravitational Universal Constant

M = Mass of the Planet

m = Mass of the object

r = Distance

Therefore the amount of force exerted by the first object on the second object is equal to the amount of the force exerted on the second object by the first.

The gravitational force exerted by Larry on the Earth is same as the force exerted on Larry by the Earth.

That is 300N.

4 0
3 years ago
If Noah runs three laps around a 200 meter track in two minutes, what is the average speed of Noah in m/s?
devlian [24]
• 3 laps of 200 meter track = 600 meters
• 600 meters ran in 2 minutes
• 2 minutes = 120 seconds
• 600 meters / 120 seconds = 5 m/s on average
6 0
3 years ago
You design toys for a toy company. Your boss wants you to hook up the lights in the toy car you are working on in the cheapest w
bezimeni [28]

Answer:

put the car on fire

Explanation:

if you put it on fire you would have a lot of light now

7 0
3 years ago
Read 2 more answers
The age of the universe in seconds
Marianna [84]

Answer:

4.351968e+17 seconds

Explanation:

So I googled age of the universe and it says 13.8 billion years.

you'll have to do some conversions:

in one year, there are 365 days. in one day, there are 24 hours. in one hour, there are 3600 seconds.

\frac{1 year}{365 days} x \frac{1 day}{24 hours} x \frac{1 hour}{3600 seconds}

so you have to add in the current age of the universe to that equation:

\frac{x seconds}{13.8 bil years} x \frac{1 year}{365 days} x \frac{1 day}{24 hours} x \frac{1 hour}{3600 seconds}

arranged so that the proper "units" will read as "x seconds" at the end of the equation.

then you do the math to find x:

13.8 billion x 365 x 24 x 3600 = 4.351968e+17 seconds.

which would be 435,196,800,000,000,000 seconds

Hope this helps :)

7 0
4 years ago
Q1) An average force of 50.0 N is exerted on a 4.0-kg cart for 2.0 seconds.
lozanna [386]
<h3>a. The impulse</h3>

The impulse is 100.0 Ns

The impulse I = Ft where

  • F =average force = 50.0 N and
  • t = time = 2.0 s

Substituting these values into the equation, we have

I = Ft

I = 50.0 N × 2.0 s

I = 100.0 Ns

The impulse is 100.0 Ns

<h3>b. Change in momentum</h3>

The change in momentum is 100 kgm/s

Since change in momentum Δp = I where I = impulse.

Since I = 100.0 Ns,

Substituting this into the equation, we have

Δp = I

= 100.0 Ns

= 100 kgm/s

The change in momentum is 100 kgm/s

<h3>c. Mass's change in velocity</h3>

The change in velocity is 25.0 m/s

Since change in momentum Δp = mΔv where

  • m = mass = 4.0 kg and
  • Δv = change in velocity.

Making Δv subject of the formula, we have

Δv = Δp/m

Substituting the values of the variables into the equation, we have

Δv = Δp/m

Δv = 100.0 kgm/s/4.0 kg

Δv = 25.0 m/s

The change in velocity is 25.0 m/s

Learn more about impulse here:

brainly.com/question/25700778

3 0
3 years ago
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