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maw [93]
3 years ago
14

a man can row a boat at 4 km per hour in still water. he rolls the boat two kilometre upstream and 2 kilometre back to a startin

g place in 2 hours how fast is the stream flowing​
Physics
2 answers:
stiv31 [10]3 years ago
5 0

Answer:

I would say since it is still water the stream flow is 0km/h. Especially because he needs the same time upstream as He does down stream.

FromTheMoon [43]3 years ago
3 0

Answer:

sorry I don't give answers

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The position of a particle moving along the x axis is given by x = (21 + 22t – 6 t2) m, where t is in s. What is the average vel
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Answer:

12m/s

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x = (21 + 22t – 6 t2) m,

We can express change bin velocity as

dx/dt= -12t + 22

But Velocity is changing

interval t = 1 s

t = 4 s

at t = 1, x = 21 + 22(1) -6(1)^2

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at t = 4, x = 21 + 22(4) -6(4)^2

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Distance travelled at interval t = 1 s

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3 years ago
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A tetrahedron has an equilateral triangle base with 25.0-cm-long edges and three equilateral triangle sides. The base is paralle
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Answer:

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b. 2.348 Nm²/C

Explanation:

Data given:

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In order to find the electric flux we first have to find out the area of triangle.

Area of triangle = \frac{\sqrt{3} }{4} a^{2}

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Lets find electric flux,

      Electric Flux = E. A

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                          = 7.046 Nm²/C

Now we can find the electric flux through each of the three sides.

Electric flux through three sides = \frac{7.046}{3}

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