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4 years ago

How can parallax allow us to determine the distance to a star

Physics

1 answer:

tensa zangetsu [6.8K]4 years ago

4 0

Answer:

Astronomers use a method similar to the one you used with your homemade quadrant. Twice the distance to the Sun, divided by the distance to the star (which is unknown so far) is equal to the tangent of the parallax angle of the star.

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CAN YOU HELP PLZZ & THX

maxonik [38]

Answer:

6.7x10 -7 C

Explanation:

The -7 is like a exponent on top, I think.

6 0

3 years ago

A 40.0 turn coil of wire of radius 3.0 cm is placed between the poles of an electromagnet. The field increases from 0 to 0.75 T

nadezda [96]

Answer:

Induced emf, $V=3.76\times 10^{-4}\ V$

Explanation:

We have,

Number of turns in the coil, N = 40

Radius of coil, r = 3 cm = 0.03 m

The field increases from 0 to 0.75 T at a constant rate in a time interval of 225 s.

It is required to find the magnitude of the induced emf in the coil if the field is perpendicular to the plane of the coil. The induced emf is given by :

$\epsilon=\dfrac{d\phi}{dt}$

$\phi=NBA\cos\theta$ , is magnetic flux

$\epsilon=NA\dfrac{dB}{dt}\\\\\epsilon=\dfrac{40\times \pi (0.03)^2\times (0.75-0)}{225}\\\\\epsilon=3.76\times 10^{-4}\ V$

So, the magnitude of induced emf is $3.76\times 10^{-4}\ V$ .

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3 years ago

Why does the area around the equator stay about the same temperature year round?

Verdich [7]

Axial Tilt and Sun Energy

This axial tilt means that during the Earth's journey around the sun the poles receive varying amounts of sunlight. The equator, however, receives relatively consistent sunlight all year. The consistency of energy means the equator's temperature stays relatively constant all year.

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3 years ago

In which position does the ball have the least potential energy but the most kinetic energy

Firdavs [7]

Answer:

position 2

Explanation:

the gravity from the ball to the floor had the most movement involved.

5 0

4 years ago

What is the formula for displacement?

qwelly [4]

Displacement = final - initial
The formula most closely resembling that is delta = xf - xi

7 0

3 years ago

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