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Ulleksa [173]
2 years ago
11

25. a small container of water is placed on a turntable inside a microwave oven, at a radius of 12.0 cm from the center. the tur

ntable rotates steadily, turning one revolution in each 7.25 s. what angle does the water surface make with the horizontal?
Physics
1 answer:
Oksanka [162]2 years ago
4 0

The angle that the water surface make with the horizontal is 0.527°.

<h3>How to calculate the angles?</h3>

The water vapor moves at speed. Therefore,

v = 2πr/T = (2 × π × 0.120)/7.25

= 0.104m/s

Also, the top layer of water deals a downward force if gravity which will be:

= mv²/r = 0.104/0.12 = 0.0901

There, the angle will be:

= tan(0.0901/9.8)

= 0.527°

In this case, the angle that the water surface make with the horizontal is 0.527°.

Learn more about angles on:

brainly.com/question/25716982

#SPJ4

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Answer: This is true

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The magnetic field at the equator points north. If you throw a positively charged object (for example, a baseball with some elec
PilotLPTM [1.2K]

Answer:

The magnetic force points in the positive z-direction, which corresponds to the upward direction.

Option 2 is correct, the force points in the upwards direction.

Explanation:

The magnetic force on any charge is given as the cross product of qv and B

F = qv × B

where q = charge on the ball thrown = +q (Since it is positively charged)

v = velocity of the charged ball = (+vî) (velocity is in the eastern direction)

B = Magnetic field = (+Bj) (Magnetic field is in the northern direction; pointing forward)

F = qv × B = (+qvî) × (Bj)

F =

| î j k |

| qv 0 0|

| 0 B 0

F = i(0 - 0) - j(0 - 0) + k(qvB - 0)

F = (qvB)k N

The force is in the z-direction.

We could also use the right hand rule; if we point the index finger east (direction of the velocity), the middle finger northwards (direction of the magnetic field), the thumb points in the upward direction (direction of the magnetic force). Hence, the magnetic force is acting upwards, in the positive z-direction too.

Hope this Helps!!!

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3 years ago
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Yeah it's right there from the one next to the exclamation point

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3 years ago
Read 2 more answers
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boyakko [2]

Answer:

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3 years ago
2. An alternating current is represented by the equation I=20sin 100mt.
Sladkaya [172]

Explanation:

The general equation of an AC current is given by :

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I₀ is the peak value of current

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As\ \omega=2\pi f

So,

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We know that,

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So, the frequency is 50 Hz and the maximum rms value of current is 14.14 A.

3 0
3 years ago
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