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3 years ago

6

Jaleh takes path 1 from point A to point B. She then runs from point B back to point A, following path 3. It takes her 500 secon

ds to make the round trip.
What is Jaleh's velocity for the entire trip?

1 answer:

Vika [28.1K]3 years ago

7 0

Answer:

C

Explanation:

A P E X

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3 years ago

A bar of silicon is 4 cm long with a circular cross section. If the resistance of the bar is 280 Ω at room temperature, what is

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Answer:

r = 17.05 cm

Explanation:

Given that,

Length of silicon bar is 4 cm or 0.04 m

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Using definition of resistance of an object. It is given by :

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So,

$R=\rho\dfrac{l}{\pi r^2}\\\\r^2=\dfrac{\rho l}{R\pi}\\\\r^2=\dfrac{640\times 0.04}{280\pi}\\\\r=0.1705\ m\\\\r=17.05\ cm$

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