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ValentinkaMS [17]
3 years ago
8

Which of the following is a positive statement?

Physics
1 answer:
Ainat [17]3 years ago
5 0

Answer:B

Explanation:

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A current of 2.0A flows through a light bulb. What is the amount of charge flowing through the light bulb in 40 seconds?
lidiya [134]

Answer:

Quantity of charge = 80 Coulombs

Explanation:

Given the following data;

Current = 2 A

Time = 40 seconds

To find the amount of charge flowing through the light bulb;

Mathematically, the quantity of charge passing through a conductor is given by the formula;

Quantity of charge = current * time

Substituting into the formula, we have;

Quantity of charge = 2 * 40

Quantity of charge = 80 Coulombs

5 0
2 years ago
What is the net force of a 25 g object with an acceleration of 3 m/s^2? 100PTS
gayaneshka [121]

Explanation:

Force=Mass×acceleration

force=25×3

force=75N

5 0
3 years ago
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A model rocket is launched straight upward with an initial speed of 56.5 m/s. It accelerates with a constant upward acceleration
marta [7]

Answer:

Maximum height reached by the rocket, h = 202.62 meters            

Explanation:

It is given that,

Initial speed of the model rocket, u = 56.5 m/s

Constant upward acceleration, a=1.96\ m/s^2

Distance traveled by the engine until it stops, d = 198.8 m

Let v is the speed of the rocket when the engine stops. It can be calculated using the third equation of motion as :

v=\sqrt{u^2+2ad}

v=\sqrt{(56.5)^2+2\times 1.96\times 198.8}    

v = 63.02 m/s

At the maximum height, v = 0 and the engine now decelerate under the action of gravity, a = -g. Let h is the maximum height reached by the rocket.

Again using third equation of motion as :

v^2-u^2=-2gh

h=\dfrac{v^2-u^2}{-2g}

h=\dfrac{u^2}{2g}

h=\dfrac{(63.02)^2}{2\times 9.8}

h = 202.62 meters

So, the maximum height reached by the rocket is 202.62 meters. Hence, this is the required solution.

3 0
3 years ago
¿Cuáles son los fenómenos que no se pueden explicar con la teoría corpuscular de la luz?
maxonik [38]
The answer is diffraction or interference
5 0
2 years ago
The diagram shows how an image is produced by a plane mirror.
nadezda [96]

I had this question on a quiz, it was X.

3 0
3 years ago
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