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Tju [1.3M]
4 years ago
5

Magnetic field lines curve out from one pole and return to the same pole. Please select the best answer from the choices provide

d T F
Physics
1 answer:
Crank4 years ago
6 0

Magnetic field lines always forms closed loop in such a way that it originates from North pole and then terminates back into the South pole

Inside the magnet we will draw the field lines from south pole to north pole

So it is not possible that magnetic field lines originates from north pole and again terminates at the same pole

So this is

FALSE

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Which factors affect the gravitational force between objects? Check all that apply.
drek231 [11]

Explanation:

distance between both objects and masses of the objects

4 0
3 years ago
Read 2 more answers
A hydraulic system at the mechanic shop can perform up to 180,000 joules of work in a day. if throughout the day it can lift 10
snow_tiger [21]

Answer:

9,000 N.

Explanation:

Workdone can be defined as the ability to do work. It is also the product of the force and the distance it is being moved.

Mathematically,

W = F * d

= 180,000/2

= 90,000 N.

Weight of the 10 cars = 90,000 N.

Weight of a car = 90000/10

= 9,000N.

5 0
4 years ago
A ray of light (f = 5.09 x 1014 Hz) is incident on the boundary between air and an unknown material X at an angle of incidence o
11Alexandr11 [23.1K]

Answer:

A) Material X is flint glass

B) Speed of light in the X material is 1.807 x 10^{8} m/s

C) Angle of refraction of light in medium X is 29.57^{o}

Explanation:

Given data:

frequency of the light f = 5.09 x 10^{14} Hz

angle of incidence Θ_{i} = 55^{o}

index of refraction of material n_{2} = 1.66

A) To find material X

Given the index of refraction is 1.66 and hence the material is the flint glass

B) To calculate the speed of light in the material.

We know that the relation between index of refraction (n), velocity of light (c = 3 x 10^{8} m/s) and velocity of light is given by the equation:

n = c/v

Hence,

Speed of light in the X material v = c/n

                                                          = \frac{3 x 10^{8} }{1.66}

                                                          = 1.807 x 10^{8} m/s

C) To calculate angle of refraction of light in medium X

We know that the Snell's law states that

                       n_{1} sin Θ_{i}  = n_{2} sin Θ_{r}

n_{1} = incident index

n_{2}  = refracted index

Θ_{i} = incident angle

Θ_{r} = refracted angle

In given problem, n_{1} = 1 since medium is air

Substituting the known values, we get

1 x  sin 55^{o}  = 1.66 x sin Θ_{r}

sin Θ_{r} = sin 55^{o} /1.66

           = 0.4935

Hence, angle of refraction of light in medium X Θ_{r} = sin^{-1} (0.4935)

                                                                                       = 29.57^{o}

4 0
3 years ago
A balloon of hydrogen is put into to pressure chamber. The initial pressure and volume of hydrogen is 1 atm and .5 cm3. The pres
Elis [28]

Answer:

0.25 cm³.

Explanation:

We shall apply Boyle's law to find the solution . According to it

PV = constant where P is pressure and V is volume of the gas.

P₁ V₁ = P₂V₂

1 x .5 = 2 x V₂

V₂ = 0.25 cm³.

4 0
3 years ago
Please help asap!!!!
Lady bird [3.3K]

Answer:

4 is the answer

Explanation:

hope this helps

7 0
3 years ago
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