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3 years ago

Define null pointdefine null point

Physics

1 answer:

miv72 [106K]3 years ago

4 0

Answer:

In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other

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An incandescent bulb is supplied with

Serga [27]

Answer:

Efficiency = 5%

Explanation:

Given that,

Supplies energy to the bulb = 100 J

Transferred energy by the bulb = 5 J

We need to find the efficiency of the bulb. It can be given by "

$\eta=\dfrac{\text{useful energy out}}{\text{useful energy in}}\times 100\\\\=\dfrac{5}{100}\times 100\\\\=5\%$

So, the efficiency of the bulb is 5%.

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3 years ago

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3 years ago

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How does Newton's law of motion describe when and how objects move?

r-ruslan [8.4K]

Newton's laws of motion relate an object's motion to the forces acting on it. ... In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

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3 years ago

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A hockey puck slides across the ice with an initial velocity of 7.3 m/s .It has a decleration of 1.1 m/s and is traveling toward

sashaice [31]

Answer:

t = 6.63 s

Explanation:

Given that,

Initial velocity of the puck, u = 7.3 m/s

Deacceleration of the puck, a = -1.1 m/s²

Distance traveled, d = 5 m

We need to find the time the goalie have to stop the puck. Using equation of motion.

v = u +at

v = 0 (stops)

So,

$u=-at\\\\t=\dfrac{u}{-a}\\\\t=\dfrac{7.3}{-(-1.1)}\\\\t=6.63\ s$

So, the required time is 6.63 seconds.

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3 years ago

Write an essay about Paralympic and Special Olympic Essay 100 points

wlad13 [49]

Answer:

The Paralympics does the same. The Special Olympics and the Paralympics are both sports organizations for disabled athletes, but they are very different organizations and are not connected. Many people confuse the Paralympics and the Special Olympics.

Explanation:

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3 years ago

Define null pointdefine null point ​

Define null pointdefine null point