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Pani-rosa [81]
3 years ago
10

In an electric motor, periodically changing the electromagnet can cause the axle to spin because

Physics
2 answers:
kvasek [131]3 years ago
5 0
We want to know why does the axle spin in the electric motor. When we periodically change the electromagnet via alternate current, the magnetic field reverses directions which creates a force on the axle and so the axle starts spinning. So the correct answer is d. the magnetic field reverses direction. 
amm18123 years ago
4 0
The answers are,

B
B
D
D


Hope I helped!
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Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. Please select the best answer fr
astraxan [27]

Answer: True

Explanation: Following are the properties that are used to identify minerals:

(1) Color

(2) Hardness

(3) Magnetism : It is the property of mineral to attract or repel with other magnetic materials.

(4) Luster : It is the property that shows the surface is reflecting light or not.

(5) Reactivity: Reactivity is also responsible to identify mineral. How the mineral is reacting with acids, bases etc helps to identify type of minerals.

3 0
3 years ago
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Cobaltâ’60 is a radioactive isotope used to treat cancers of the brain and other tissues. A gamma ray emitted by an atom of this
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Energy of gamma rays is given by equation

E = h\nu

here we know that

h = Planck's constant

\nu = frequency

now energy is given as

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E = 7.52 \times 10^{-13} J

now by above equation

E = h\nu

7.52 \times 10^{-13} = 6.6 \times 10^{-34} \nu

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now for wavelength we can say

\lambda = \frac{c}{\nu}

\lambda = \frac{3\times 10^8}{1.14 \times 10^{21}}

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3 0
3 years ago
4. What type of assessments are based on repeatable, measurable data?
Harman [31]

Answer:

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Explanation:

PLS MAKE ME BRAINLIEST

8 0
2 years ago
In a stadium, fans stand up and sit down to produce a wave across the stadium. This type of wave where the material travels perp
puteri [66]
Correct option B

Transverse waves are those waves whose particles vibrate perpendicular to the direction of wave.

Hope This Helps You!
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