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cricket20 [7]
3 years ago
7

Jaką masę ma ciał umieszczone na wysokości 100m, jeśli jego energia potencjalna jest równa 1 kJ? Zapisz wzór i obliczenia z jedn

ostkami
Physics
1 answer:
Debora [2.8K]3 years ago
6 0

Answer:

Masę, m = 1,02 kilograma

Explanation:

Biorąc pod uwagę następujące dane;

Wysokość = 100 m

Energia potencjalna = 1 KJ = 1000 dżuli

Wiemy, że przyspieszenie ziemskie wynosi 9,8 m/s².

Znaleźć masę obiektu;

Energię potencjalną można zdefiniować jako energię posiadaną przez obiekt lub ciało ze względu na jego położenie.

Matematycznie energia potencjalna jest określona wzorem;

P.E = mgh

Gdzie;

P.E reprezentuje energię potencjalną mierzoną w dżulach.

m reprezentuje masę obiektu.

g reprezentuje przyspieszenie ziemskie mierzone w metrach na sekundę kwadratową.

h oznacza wysokość mierzoną w metrach.

Podstawiając do wzoru, mamy;

1000 = m * 9,8 * 100

1000 = m * 980

Masę, m = 1000/980

Masę, m = 1,02 kilograma

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Answer:

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Explanation:

This exercise is about Faraday's law

         fem = - \frac{ d \Phi_B}{dt}

where the magnetic flux is

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the bold are vectors

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we assume that the angle between the magnetic field and the normal to the area is zero

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linear and angular velocity are related

        v = w r

        w = 2π f

        v = 2π f r

we substitute

        fem = - 2π B r (2π f r)

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For the magnetic field of Jupiter we use the equatorial field B = 428 10⁻⁶T

we reduce the magnitudes to the SI system

       f = 2 rev / s (2π rad / 1 rev) = 4π Hz

we calculate

       fem = - 4π² 428 10⁻⁶ 4π 0.10²

       fem = - 16π³ 428 10⁻⁶ 0.010

       fem = - 2.1514 10⁻⁴ V

for the current let's use Ohm's law

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        I = V / R

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Answer:

(a). The reactive power is 799.99 KVAR.

(c). The reactive power of a capacitor to be connected across the load to raise the power factor to 0.95 is 790.05 KVAR.

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(a). We need to calculate the reactive power

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We need to calculate the \phi

Using formula of \phi

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Q=600\tan(53.13)

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(c). We need to calculate the reactive power of a capacitor to be connected across the load to raise the power factor to 0.95

Using formula of reactive power

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We need to calculate the difference between Q and Q'

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Put the value into the formula

Q''=799.99-9.94

Q''=790.05\ KVAR

Hence, (a). The reactive power is 799.99 KVAR.

(c). The reactive power of a capacitor to be connected across the load to raise the power factor to 0.95 is 790.05 KVAR.

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