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bulgar [2K]
3 years ago
10

A student puts a besker of warm water next to a besker of cold water so that they fough which two statements are true? DA Therma

l energy will move from the warm water to the cold water Thermal energy will move from the air to the cold water. Thermal energy utill move from the air to the warm water Thermal energy till move from the cold water to the warm water ​
Physics
1 answer:
sladkih [1.3K]3 years ago
3 0

Explanation:

so sorry

don't know but please mark me as brainliest please

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Answer:

i think it is iron

Explanation:

its the only one that makes sense to me

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A 1-kilogram turtle crawls in a straight line at a speed of 0.01 m/sec what is the turtles momentum
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The term water cycle refers to how water moves _____.
allochka39001 [22]

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The water cycle shows how water moves around earth.

Ex: Runoffs,precipitation, condensation, evaporation.

-Steel jelly

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2 years ago
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True or false?
Ksju [112]

1. False

Explanation: it's exactly the opposite. In fact, Lenz's law states that the induced current and the induced emf in a conductor are generated in such a direction that opposes to the change in magnetic flux through the coil. This is summarized by the negative sign in the Faraday's Newmann Lenz law:

\epsilon= -\frac{d\Phi }{dt}

where \epsilon is the emf induced and \frac{d\Phi}{dt} is the rate of change of magnetic flux through the coil.

Lenz's law is a consequence of the law of conservation of energy. In fact, we have:

- If the magnetic flux through a coil is increasing, then the induced current has a direction such that the magnetic field generated by the coil is opposite to the direction of the external magnetic field, in order to decrease the total flux

- If the magnetic flux through a coil is decreasing, then the induced current has a direction such that the magnetic field generated by the coil is in the same direction as the external field, in order to increase the total flux

2. False

Explanation: the magnetic flux through a surface is given by

\Phi = BA cos \theta

where

B is the magnitude of the magnetic field

A is the surface area

\theta is the angle between the direction of B and the normal vector to the surface

As we see, the magnetic flux depends not only on B and A, but also on the orientation of the coil with respect to the magnetic field.

3. False

Explanation:

- Sound waves are mechanical waves: mechanical waves are waves consisting of oscillations of the particles in a medium. Due to their nature, therefore, mechanical waves can propagate only in the presence of a medium

- Electromagnetic waves are NOT mechanical waves: they consist of oscillations of electric and magnetic fields, in a direction perpendicular to the direction of propagation of the wave. Since em waves are not mechanical waves, they do NOT need a medium to propagate, since they can also travel through a vacuum; therefore the original statement is false.

5 0
2 years ago
Question 6 of 10
user100 [1]

Answer:

the answer is c

Explanation:

8 0
3 years ago
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