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Vesna [10]
3 years ago
11

A flying stationary kite is acted on by a force of 9.8 N downward. The wind exerts a force of 45 N at an angle of 50.0 degrees a

bove the horizontal. Find the force that the string exerts on the kite.
Physics
1 answer:
Savatey [412]3 years ago
7 0

Answer:

38 N, 40.0° below the horizontal

Explanation:

Force exerted by an object equals mass times acceleration of that object: F = m ⨉ a. To use this formula, you need to use SI units: Newtons for force, kilograms for mass, and meters per second squared for acceleration.

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Find the specific heat of a substance that requires 8000 J of energy to heat up 400g by 20 C?
monitta

Answer:

c=1\ J/g^\circ C

Explanation:

Given that,

Heat required, Q = 8000 J

Mass, m = 400 g

The change in temperature, \Delta T = 20^{\circ}

The heat required due to change in temperature is given by :

Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{8000 }{400\times 20}\\\\c=1\ J/g^\circ C

So, the specific heat of the substance is 1\ J/g^\circ C

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Which of these planets has characteristics most similar to Neptune?
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D. Saturn, Jupiter and Uranus
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What is the position of the earth, moon, and sun during a new moon?
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The Moon always rotates about the Earth in its orbit. The position of the Earth, moon and sun during a new moon is Earth is in between Sun and Moon.

<h3>What is new moon?</h3>

When moon has travelled for 14 days, it starts its journey again for the next 14 days. The journey starts from the new moon to the full moon. The position of new and full moon is the same. At this time, the Earth is in between the Sun and the Moon.

Thus, the position of the Earth, moon and sun during a new moon is Earth is in between Sun and Moon.

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The left ventricle of the heart accelerates blood from rest to a velocity of 26 cm/s. (a) If the displacement of the blood durin
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Explanation:

Initial speed of blood, u = 0

Final speed of the blood, v = 26 cm/s

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Let a be its acceleration. It can be calculated using third equation of motion as :

a=\dfrac{v^2-u^2}{2s}

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(b) Let t is the time taken by the blood to reach its final speed. It can be calculated as :

<u>t=\dfrac{v-u}{a}</u>

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t = 0.15 s

Hence, this is the required solution.

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3 years ago
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