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Vsevolod [243]
3 years ago
6

If a bottlel filled with water 25c and freezes at -5c the waters tempreture drop what is the sign of the systems q,w,ΔE

Physics
1 answer:
laila [671]3 years ago
6 0
Triangle because h2o and celsious have yhree silibyles and the triangle has three sides
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How to calculate the angle of a resultant<br>​
stiv31 [10]

Answer:

The direction angle θ of the resultant in the Polar (positive) specification is then θ = α + 60°. The Law of Cosines is used to calculate the magnitude (r) and the Law of Sines is used to calculate the angle (α).

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3. Two people push on a car with a force of 5150 N, and the car moves a distance of 8.0m. What is the
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I think c not sure tho
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The current through a 50ohm's resistance is 2A , how much power is dissipated as heat.<br>​
iris [78.8K]

Answer:

<u>Power</u><u> </u><u>is</u><u> </u><u>5</u><u>0</u><u>0</u><u>0</u><u> </u><u>W</u>

Explanation:

{ \bf{P=I {}^{2} R}}

<em>P</em><em> </em>is power

<em>I</em><em> </em>is current

<em>R</em><em> </em>is resistance

P=50 {}^{2}  \times 2 \\ P=5000{}^{}  \: watts

8 0
3 years ago
What are dreams, where do they originate from, why do we have dreams, and are they psychic visions or something? Please explain
Slav-nsk [51]
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3 years ago
Two gratings A and B have slit separations dA and dB, respectively. They are used with the same light and the same observation s
77julia77 [94]

Answer:

a) dB / dA = 2 ,

b) Network B     Network A

        2                         1

        4                         2

        6                         3

Explanation:

a) The expression for grating diffraction is

         d sin θ = m λ

where d the distance between two slits, λ the wavelength and m an integer that represents the diffraction range

In this exercise we are told that the two spectra are in the same position, let's write the expression for each network

Network A

m = 1

         sin θ = 1 λ / dA

Network B

m = 2

        sin θ = 2 λ / dB

they ask us for the relationship between the distances, we match the equations

            λ / dA) = 2 λ / dB

            dB / dA = 2

         

b) let's write the equation of the networks

         sin θ = m_A  λ / dA

         sin θ = m_B  λ / dB

we equalize

           m_A  λ/ dA = m_B  λ / dB

we use that

          dB / dA = 2

           m_A 2 = m_B

therefore the overlapping orders are

Network B     Network A

   2                         1

   4                         2

    6                       3

4 0
3 years ago
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