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nlexa [21]
4 years ago
12

There is a reflection at the boundary between two materials if there is a change of __________ at the boundary.

Physics
1 answer:
melisa1 [442]4 years ago
8 0
<span>The speed of the light in the materials. Hope this helps!!</span>
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When helping someone whose car has a "dead" battery, how should your car's battery be connected in relation to the dead battery?
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Positive terminal with Positive terminal. The negative terminal should be connected to the car chassis.
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4 years ago
A person runs 15 kilometers in two hours what is his/her average speed ​
bazaltina [42]

Answer:

\displaystyle V=7.5\ km/h

Explanation:

<u>Average Speed </u>

If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:

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\displaystyle V=\frac{15\ km}{2\ h}

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\boxed{\displaystyle V=7.5\ km/h}

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Morgarella [4.7K]

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Read 2 more answers
Set up a parallel circuit with three resistors. Set up the battery to be 9 V, one resistor at 10 Ohms, the other at 21 Ohms, and
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In a parallel circuit, the equivalent resistance is the reciprocal of (the sum of the individual reciprocals).

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Each resistor has the same 9v of EMF across it.

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