3 years ago

Why does a sheet of sandpaper become warm when you rub it against a wooden board?

Physics

2 answers:

tankabanditka [31]3 years ago

8 0

Friction gets built up between the two friction is everywhere

velikii [3]3 years ago

7 0

It's actually Because the the friction between wood and sandpaper moves so fast it can actually warm up so hot and diesel can start. for example a rock and another rock. the friction causes sparks and heat

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just olya [345]

Answer:

The value of smaller resistor is 248 Ω.

Explanation:

Voltage divider circuit is used to convert a higher voltage to a smaller voltage with the help of resistors which are connected in parallel.

As shown in the circuit, Vs is the source voltage, R₁ and R₂ are the two resistors and V₀ is the output voltage.

Applying KVL in the circuit, the output voltage is given by :

$V_{0} = \frac{V_{s}R_{2} }{R_{1} + R_{2} }$

According to the problem, R₂ = 310Ω , V₀ = 5 V and Vs = 9 V. Substitute these values in the above equation.

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$R_{1} = 558 - 310$

R₁ = 248Ω

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This is true there is no question here

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Answer:

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4 years ago

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Answer:

118.3 J

Explanation:

Givens:

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valentina_108 [34]

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