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arsen [322]
2 years ago
6

A 7-n vector at an angle of 45° to the horizontal has a vertical component that is about _______.

Physics
1 answer:
Katarina [22]2 years ago
4 0
Vectors are easy once you break them down the right way.

Here is a shortcut formula i have got for you to use to find the x & y components of any vecor, once you know the magnitude and angle (theta):

to find the x component, use<em>:
[magnitude] * cos(theta)

to find the y component use:
[magnitude]*sin(theta)

so for this question use:
y = 7 * sin(45) = 4.94N

</em>
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What is the change in internal energy if 60 J of heat is released from a system and 30 J of work is done on the system? Use U =
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Explanation:

We can solve this problem by using the first law of thermodynamics, which states that the change in internal energy of a system is given by the equation:

\Delta U = Q -W

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\Delta U is the change in internal energy

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Therefore, in this problem, we have

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Therefore, the change in internal energy is

\Delta U = -60 - (-30) = +30 J

Learn more about thermodynamics:

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