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vivado [14]
3 years ago
15

Does a generator start a Direct Current?

Physics
1 answer:
lesya [120]3 years ago
3 0
A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. ... The field is produced by direct current in field coils or by permanent magnets on the stator. The output, or armature, windings are placed in slots in the cylindrical iron rotor.
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What statements best describe magnets?
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Answer:

they stick together when they get close

7 0
3 years ago
An antitussive is a A. non-productive cough. B. cough-suppressant medication. C. cough medication used for drying up secretions.
atroni [7]
The answer is B. An antitussive will help a cough by deterring the cough reflex.
4 0
3 years ago
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Multiple choice: Sunspots appear dark because
zepelin [54]

Answer: C. They are regions in which strong magnetic fields make it difficult for fresh supplies of hot, ionized gas to reach the photosphere

Explanation:

Sunspots appear dark because they are regions in which strong magnetic fields make it difficult for fresh supplies of hot, ionized gas to reach the photosphere.

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3 years ago
From the ground an object is vertically thrown upwards with an angle of theta.
Mashutka [201]

Answer:

u/2 √(1 + 3 cos² θ)

Explanation:

The object is thrown at an angle θ, so the velocity has two components, vertical and horizontal.

Initially, the vertical component is u sin θ and the horizontal component is u cos θ.

At the maximum height, the vertical component is 0 and the horizontal component is u cos θ.

The mean vertical velocity is:

(u sin θ + 0) / 2 = u/2 sin θ

The mean horizontal velocity is:

(u cos θ + u cos θ) / 2 = u cos θ

The net mean velocity can be found with Pythagorean theorem:

v² = (u/2 sin θ)² + (u cos θ)²

v² = u²/4 sin² θ + u² cos² θ

v² = u²/4 (1 − cos² θ) + u² cos² θ

v² = u²/4 (1 − cos² θ) + u²/4 (4 cos² θ)

v² = u²/4 (1 − cos² θ + 4 cos² θ)

v² = u²/4 (1 + 3 cos² θ)

v = u/2 √(1 + 3 cos² θ)

8 0
4 years ago
How many electron does an aluminum have
Dennis_Churaev [7]

Answer:

13

Explanation:

8 0
3 years ago
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