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3 years ago

Explain why locations near the North Pole experience weeks of sunlight in June with no sunsets.

Physics

1 answer:

Westkost [7]3 years ago

7 0

Answer:

It happens because the Earth is tilted on its axis around 23 degrees therefore the sun normally never sets at north Pole in summers. The sun doesn't set at Arctic Circle on North pole from about April 19 to August 23 each year due to this phenomenon.

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Do anyone know this ?

Galina-37 [17]

Answer:

Distance is 100m, displacement is 0m

Explanation:

Distance is how much you travelled in total (100m)

Displacement is when you compare your final and initial positions.

It is usually Final position - Initial position.

Since you start and finish at the same point, it would be 0 - 0 = 0m

So the displacement is 0m.

7 0

3 years ago

Read 2 more answers

A very long, straight solenoid with a cross-sectional area of 2.16 cm^2 is wound with 85.7 turns of wire per centimeter. Startin

Zinaida [17]

Answer:

1.74x10⁻⁵ V

Explanation:

n = 85.7 turns/cm => 8570 turns/metre

The field inside the long solenoid is given by B = μ₀ni

B = 4πx10⁻⁷ x 8570 x 0.175t² = 1.884x10⁻³ t²

dB/dt = 3.78x10⁻³ t

Cross-sectional Area'A'= 2.16 cm²=> 2.16 x $10^{-4}$ m²

Now, rate of change of flux linkage '|Emf|' is given by:

|Emf| = d(NAB)/dt = NA dB/dt

|Emf| = 5 x 2.16 x $10^{-4}$ x 3.78x10⁻³ t

|Emf| = 4.0824x10⁻⁶ t

Considering time 't' at which the current = 3.2A , we have

3.2 = 0.175T²

T² = 3.2/0.175

T = 4.28 s

|emf| = 4.0824x10⁻⁶ t => 4.0824x10⁻⁶ x4.28

|emf|= 1.74x10⁻⁵ V

Therefore,the magnitude of the emf induced in the secondary winding is 1.74x10⁻⁵ V

7 0

3 years ago

A permanent magnet creates a magnetic field at the origin with strength Bperm-1T. A current-carrying wire is oriented such that

bazaltina [42]

Answer:

Part a)

$B_{net} = (1 + 4 \times 10^{-6})T$

Part b)

$B_{net} = (1 - 4 \times 10^{-6})T$

Explanation:

Part a)

Since the two magnetic field is in same direction

so the net magnetic field is algebraic sum of magnetic field due to both

so here magnetic field of wire is given as

$B = \frac{\mu_0 i}{2\pi r}$

here we know that

I = 2 A

r = 5 cm

so we will have

$B = \frac{2 \times 10^{-7} (2)}{0.05}$

$B = 4 \times 10^{-6} T$

So net magnetic field is given as

$B_{net} = (1 + 4 \times 10^{-6})T$

Part b)

When direction of current is reversed then the direction of magnetic field is also reversed

So we will have

$B_{net} = (1 - 4 \times 10^{-6})T$

8 0

3 years ago

Artificial gravity is a must for any space station if humans are to live there for any extended length of time. Without artifici

wariber [46]

Answer:

Hi myself Shrushtee.

Explanation:

Artificial gravity is a must for any space station if humans are to live there for any extended length of time. Without artificial gravity, human growth is stunted and biological functions break down. An effective way to create artificial gravity is through the use of a rotating enclosed cylinder, as shown in the figure. Humans walk on the inside edge of the cylinder, which is sufficiently large (diameter of 2235 meters) that its curvature is not readably noticeable to the inhabitants. (The space station in the figure is not drawn to the scale of the human.) Once the space station is rotating at the necessary speed, how many minutes would it take the space station to make one revolution?

The distance traveled by the man in one revolution is simply the circumference of the space station, C = 2p R. From this result, you should be able to deduce the time it takes for the space station to sweep out a complete revolution.

<h2>Please mark me as brainleist</h2>

7 0

3 years ago

Help.. mee.. ;-; Dont answer if you dont know I dont want to fail this

timama [110]

Answer:

It would be B because the warm air heats up and then burns the marshmallow. And the heat and the marshmallow were touching each other

Explanation:

5 0

3 years ago

Read 2 more answers