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Dafna1 [17]
3 years ago
6

10) Which options below are true? [Enter your answer as a string of the letter options you believe are correct. For instance, if

you think options A, D, and E are correct, then enter "ADE"] A) The dipole is never in equilibrium since it will always twist around. B) A dipole whose moment vector is not aligned with a uniform electric field will twist around toward being aligned. C) No net force acts on the electric dipole. D) There are no electric forces exerted on each pole of the dipole. E) None of the above
Physics
1 answer:
Naya [18.7K]3 years ago
8 0

Answer:

BC

Explanation:

A)  In a uniform field , dipole can remain in rotational equilibrium as well as linear equilibrium . So statement is wrong.

A dipole whose moment vector is not aligned with a uniform electric field will twist around toward being aligned. Moment vector is aligned along the axis of the dipole. In this position torque acting on the dipole is zero so it is in rotational equilibrium.

On the dipole only torque acts and no net force acts in case of uniform electric  field. In case of non uniform magnetic field, both torque  and force exists. each pole experiences  electric force of equal magnitude.

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Explanation:

The force of the roller-coaster track on the cart at the bottom is given by :

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Case 1.

R = 60 m v = 16 m/s

F=\dfrac{(16)^2m}{60}=4.26m\ N

Case 2.

R = 15 m v = 8 m/s

F=\dfrac{(8)^2m}{15}=4.26m\ N

Case 3.

R = 30 m v = 4 m/s

F=\dfrac{(4)^2m}{30}=0.54m\ N

Case 4.

R = 45 m v = 4 m/s

F=\dfrac{(4)^2m}{45}=0.36m\ N

Case 5.

R = 30 m v = 16 m/s

F=\dfrac{(16)^2m}{30}=8.54m\ N

Case 6.

R = 15 m v =12 m/s

F=\dfrac{(12)^2m}{15}=9.6m\ N

Ranking from largest to smallest is given by :

F>E>A=B>C>D

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Deffense [45]

Answer:

v_{o}=-14.60m/s

Explanation:

<u>Kinematics equation for first Object:</u>

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but:

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y_{o}=20m

it reach the water at in instant, t1, y(t)=0:

0=y_{o}-1/2*g*t_{1}^{2}

t_{1}=\sqrt{2y_{o}/g}=\sqrt{2*20/9.81}=2.02s

<u>Kinematics equation for the second Object:</u>

The initial velocity is zero

y(t)=y_{o}+v_{o}t-1/2*g*t^{2}

but:

y_{o}=20m

it reach the water at in instant, t2, y(t)=0. If the second object is thrown 1s later, t2=t1-1=1.02s

0=y_{o}+v_{o}t_{2}-1/2*g*t_{2}^{2}

v_{o}=1/(t_{2})*(1/2*g*t_{2}^{2}-y_{o})=(1/1.02)*(1/2*9.81*1.02^{2}-20)=-14.60m/s

The velocity is negative, because the object is thrown downwards.

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A solar system is a collection of both outer and inner planetary (astronomical) bodies alongside the Moon that usually orbit around the Sun, in slightly elliptical orbits.  

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Based on astronomical science, there are nine (9) planets in the solar system and these are;

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Astronomers would most likely assume that a planet that orbited the Sun in an <u>opposite direction</u> in contrast to the other planets, originated in another star system and was gravitationally captured.

Read more on the solar system here: brainly.com/question/1286910

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