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Mrac [35]
3 years ago
5

Two magnets are held apart. Once released, the South Pole of one magnet moves toward the North Pole of another magnet until the

magnets collide. How does the graph reflect the changes in energy that occur?
Physics
1 answer:
tresset_1 [31]3 years ago
6 0

Answer:

Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.

Explanation:

easy

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Imagine that the earth and the-moon have positive charges of the same magnitud. How big isäºthe charge necesary to produce an el
lions [1.4K]

Answer:

5.7 x 10^12 C

Explanation:

Let the charge on earth and moon is q.

mass of earth, Me = 5.972 x 10^24 kg

mass of moon, Mm = 7.35 x 10^22 kg

Let d be the distance between earth and moon.

the gravitational force between them is

F_{g}=G\frac{M_{e} \times M_{m}}{d^{2}}

The electrostatic force between them is

F_{e}=\frac{Kq^{2}}{d^{2}}

According to the question

1 % of Fg = Fe

0.01 \times 6.67\times10^{-11}\frac{5.97 \times 10^{24}\times7.35 \times 10^{22}}{d^{2}}=9 \times 10^{9}\frac{q^{2}}{d^{2}}

2.927 \times 10^{35}=9 \times10^{9}q^{2}

3.25 \times 10^{25}=q^{2}

q = 5.7 x 10^12 C

Thus, the charge on earth and the moon is 5.7 x 10^12 C.

6 0
3 years ago
describes how the color and texture of a surface affect absorption and reflection of solar radiation?
Wewaii [24]

Most of the radiation, however, is absorbed by the earth's surface. ... Every surface on earth absorbs and reflects energy at varying degrees, based on its color and texture. Dark-colored objects absorb more visible radiation; light-colored objects reflect more visible radiation.

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3 years ago
Pablo wants to enter the science fair. Which question could be answered through scientific investigation?
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D.What is the best angle to throw a ball for maximum distance?  Because this is the only question in above all of them which has some scientific investigation like angle that is use in many of the physics relations.
8 0
4 years ago
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He starter motor of a car engine draws a current of 170 AA from the battery. The copper wire to the motor is 6.00 mmmm in diamet
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Answer:

129.2 C

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Explanation:

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d = Diameter = 6 mm

Charge is given by

q=it\\\Rightarrow q=170\times 0.76\\\Rightarrow q=129.2\ C

The charge passing throught the motor is 129.2 C

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Drift velocity is given by

v_d=\dfrac{J}{ne}\\\Rightarrow v_d=\dfrac{6012520.07236}{8.46\times 10^{28}\times 1.6\times 10^{-19}}\\\Rightarrow v_d=0.000444187357592\ m/s

Distance traveled

s=v_dt\\\Rightarrow s=0.000444187357592\times 0.76\\\Rightarrow s=0.00033758239177\ m=0.33758239177\ mm

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8 0
3 years ago
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<span>For this particular problem, we use Ohm's Law. This law deals with the relation between voltage and current in an ideal conductor. It states that: Potential difference across a conductor is proportional to the current that pass through it. It is expressed as V=IR. Using the equation, we can isolate I or the current to one side and the other terms to the other side. We calculate as follows:

V = IR
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Therefore, the current that is flowing through the wire supplied with 12 V and having a resistance of 20 
</span><span>Ω would be 0.6 amperes.</span>
8 0
3 years ago
Read 2 more answers
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