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harkovskaia [24]
2 years ago
8

A circuit has 3 resistors, all connected in parallel. Let R1 = 4.0 Ω, R2 = 3.0 Ω, and R3 = 6.0 Ω. What is the equivalent resista

nce of the circuit? Show all work and include units of measure.
Physics
2 answers:
ExtremeBDS [4]2 years ago
6 0

The effective resistance is the reciprocal of

1/4 + 1/3 + 1/6 =

3/12 + 4/12 + 2/12 =

9/12 Siemens

The reciprocal is 12/9 ohms.

That's 4/3 or 1.333 ohms.

Finger [1]2 years ago
5 0

Answer:

1 1/3 or 1.33333

Explanation:

First of all, you should note that the answer will be smaller than the smallest resistor. That means that the answer should be less than 3. Let's see if it is.

1/R1 + 1/R2 + 1/R3 = 1/Rt

  • R1 = 4
  • R2 = 3
  • R3 = 6

All resistors are in ohms.

1/4 + 1/3 + 1/6 = 1/Rt   You could do this using decimals, but the usual way is to use fractions.

The Common Denominator is 12

3/12 + 4/12 + 2/12 = 1/Rt

9/12 = 1/Rt                           Turn 9/12 upside down

12/9 = Rt

1 3/9 = RT

1 1/3 = Rt

1.3333 = Rt

The answer is under 3 so we know it should be right.

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Problem 7:__deletededc326999bef85931fda5d1ab0d68e21218f27b46f4f11ab80872358251b584ddeleted__ 0N86-C1-52-40-A837-22820 If object
laila [671]

Answer:

the kinetic energy of body B is twice the kinetic energy of body A

Explanation:

The kinetic energy of a body is given by

          K = ½ m v²

If two objects leave the same point, suppose that at the same height when they reach the ground they have the same velocity.

Therefore if the mass of body b is twice the mass of body A

          m_{b} = 2 m_{a}

         K_{b} = ½ (2 m_{a}) v²

          K_{b} = 2 (½ m_{a} v²)

          K_{b} = 2 K_{a}

therefore the kinetic energy of body B is twice the kinetic energy of body A

3 0
3 years ago
Two points are located on a rigid wheel that is rotating with decreasing angular velocity about a fixed axis. Point A is located
Nata [24]

Answer:

4. Both points have the same instantaneous angular velocity

Explanation:

Angular velocity is a measure of the the number of rotations per unit time. This does not depend on the radius of the wheel. Hence, all points on the wheel have the same angular velocity. This invalidates option 1.

The centripetal acceleration is given by the product to the square of the angular velocity and the radius or distance from the centre. A and B are located at different distances from the centre. Hence, they have different centripetal acceleration. This invalidates option 2.

The tangential acceleration depends on the linear velocity which itself is a product of the angular velocity and the distance from the centre. Hence, it is different for both points because they are at different distances from the centre.

Since both A and B are fixed points on the wheel, they move through equal angles in the same time. In fact, for any other fixed point, they all move through the same angle in the same time. This invalidates option 5.

4 0
2 years ago
A star is rotating at 5.55x10-5 π rad/s, its velocity decelerates at a constant rate of 0.5x10-9 π rad/s2.?
Basile [38]
<h2>The current rotational period of that star is 10.01 hours.</h2>

Explanation:

Given that,

Initial angular velocity of the star, \omega=5.55\times 10^{-5}\pi \ rad/s

It decelerates, final angular speed, \omega_f=0

Deceleration, \alpha =-0.5\times 10^{-9}\pi \ rad/s^2

It is not required to use the rotational kinematics formula. The angular velocity in terms of time period is given by :

\omega=\dfrac{2\pi}{T}

T is current rotational period of that star

T=\dfrac{2\pi}{\omega}

T=\dfrac{2\pi}{5.55\times 10^{-5}\pi \ rad/s}

T = 36036.03 second

or

1 hour = 3600 seconds

So, T = 10.01 hours

So, the current rotational period of that star is 10.01 hours. Hence, this is the required solution. Hence, this is the required solution.

4 0
3 years ago
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garik1379 [7]

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Explanation:

4 0
3 years ago
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qwelly [4]

The three parts of the ear anatomy are the outer ear, the middle ear and the inner ear. The inner ear is also called the cochlea. (‘Cochlea’ means ‘snail’ in Latin; the cochlea gets its name from its distinctive coiled up shape.)

The outer ear consists of the pinna, ear canal and eardrum
The middle ear consists of the ossicles (malleus, incus, stapes) and ear drum
The inner ear consists of the cochlea, the auditory (hearing) nerve and the brain
Sound waves enter the ear canal and make the ear drum vibrate. This action moves the tiny chain of bones (ossicles – malleus, incus, stapes) in the middle ear. The last bone in this chain ‘knocks’ on the membrane window of the cochlea and makes the fluid in the cochlea move. The fluid movement then triggers a response in the hearing nerve.

                                                        or

<span>Sound waves enter the ear canal and make the ear drum vibrate. This action moves the tiny chain of bones (ossicles – malleus, incus, stapes) in the middle ear. The last bone in this chain 'knocks' on the membrane window of the cochlea and makes the fluid in the cochlea move.

please mark me as brainliest!!

</span>

7 0
3 years ago
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