3 years ago

Match the elements with its definition.

Physics

1 answer:

Snezhnost [94]3 years ago

8 0

The metal term is d

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you are hiking along a river and see a tall tree on thhe opposite bank. You measure the angle of elevation of the top of the tre

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Answer:

Explanation:

Let the height of the tree is y and the distance of tree from point B is x.

According to the diagram

$tan61 = \frac{y}{x}$

x = 0.55 y ..... (1)

$tan49.5 = \frac{y}{50+x}$

(50 + 0.55y) 1.17 = y ..... from equation (1)

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3 years ago

A square loop of wire, with sides of length a, lies in the first quadrant of the xy plane, with one corner at the origin. In thi

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Answer:

$emf=-\dfrac{1}{2}kta^5$

Explanation:

Given that

B(y, t) = k y ³t²

To find the total flux over the loop we have to integrate over the loop

$\phi =\int B.dS$

Given that loop is square,so

$\phi =\int B.dS$

B(y, t) = k y ³t²

$\phi =kt^2\int_{0}^{a}dx\int_{0}^{a}y^3dy$

$\phi =\dfrac{1}{4}kt^2a^5$

We know that emf given as

$emf=-\dfrac{d\phi }{dt}$

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Determine the kinetic energy of a 1000kg rollercoaster car that is moving with a speed of 20.0 m/s

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hope this helps :)

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When an object moves, where does the energy come from?

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