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Gekata [30.6K]
3 years ago
6

Which expression should appear in the blue box to compute percent error? Accepted value – Experimental value Accepted value × Ex

perimental value Experimental value + Accepted value Experimental value – Accepted value
Physics
1 answer:
Alexxx [7]3 years ago
5 0
The last choice ... Experimental value -- <span>Accepted value ... is the place
to start, but it doesn't quite get you there.

To find the FRACTIONAL error, you'd have to divide that difference
by the Accepted Value.


And then . . .

To find the PERCENTAGE error, you'd have to multiply
the fractional error by 100 .
</span>
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Given a block of glass that is semi-circular, a laser pointer, protractor/ruler, and index card, design your own experiment to o
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Answer:

we go up the ramp there is a point where the beam is reflected inside the block, we carefully step back to the point where the beam is horizontal, we measure this angle which is our critical angle.

Explanation:

To design the experiment of measuring the critical angle, we describe the phenomenon, when the light passes from a medium with a higher refractive index to one with a lower index, it separates from the normal one and the Critical Angle is defined as the Angle for which the refraction occurs at 90º

            n₂ sin θ₂ = n₁ sin 90

           n₁ / n₂ = sin θ₂

As we can see, we have to measure the angle with which the laser touches the exit surface of the glass block.

Design of the experiment:

    We place the glass block on the ramp and at the top we hit the conveyor for half the angle, we climb the block on the ramp and see that the angle of incidence of lightning on the exit face changes, part of the beam comes out of the glass , we see it by dispersion in the particles of dirty in the air; Maybe the conveyor or the laser should be moved slightly so that the beam touches the point of origin on the conveyor.

   

   When we go up the ramp there is a point where the beam is reflected inside the block, we carefully step back to the point where the beam is horizontal, we measure this angle which is our critical angle.

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3 years ago
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A spring is stretched to a displacement of 3.4 m from equilibrium. Then the spring is released and allowed to recoil to a displa
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3 years ago
Earth's core is the source of the energy that drives the movement of tectonic
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Answer:

B. Convection

D. Conduction

Explanation:

Conduction and convection are the two most prominent processes that helps transfer energy outward to the earth's crust.

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  • Also, heat that accreted during the formation of the earth is a significant source of internal energy.
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A long ramp made of cast iron is sloped at a constant angle θ = 52.0∘ above the horizontal. Small blocks, each with mass 0.42 kg
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Answer:

For cast iron we have

h = 0.92 m

For copper

h = 1.05 m

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Explanation:

As we know that final speed of the block is calculated by work energy theorem

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now we have

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now we have

v^2 = 2gh - 2\mu_k g h cot\theta

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4 = \sqrt{2(9.81)(h)(1 - 0.15cot52)}

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4 = \sqrt{2(9.81)(h)(1 - 0.29cot52)}

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4 = \sqrt{2(9.81)(h)(1 - 0.43cot52)}

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4 = \sqrt{2(9.81)(h)(1 - 0.85cot52)}

h = 2.43 m

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