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tatyana61 [14]
3 years ago
8

How do we know the sun rotate

Physics
2 answers:
Dima020 [189]3 years ago
8 0

Answer:  One side is blue-shifted and the other side is red-shifted.

Explanation: APEX 12/31/19

scoundrel [369]3 years ago
6 0

Answer:

From the movement of sunspots, Galileo discovered that sun rotate s on its own axis.

Explanation:

All the sunspots are traveling across the Sun's head. This movement is part of the Sun's general rotation of its axis. Observations also suggest that the Sun does not rotate like a solid body, but rotates differently because it is a gas. Actually the Sun is spinning faster at its equator than at at its poles. The Sun rotates once every 24 days at its equator, but only once every 35 days at its poles. We learn this by observing the movement of sunspots and other solar features pass through the Sun.

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A pizza delivery must make three stops on her route. She will first leave the restaurant and travel 4km due north to the first h
miss Akunina [59]

5.3 km

This question involves continuous displacement in various directions. When it becomes difficult to imagine, vector analysis becomes handy.

Let us denote each of the individual displacements by a vector. Consider the unit vectors as the unit vectors in the direction of East and North respectively.

By simple calculations, we can derive the unit vectors j,\frac{-i-j}{2} and in the directions North,  South of West, and  North of West respectively.

So Total displacement vector = The Sum of individual displacement vectors.

Displacement vector = -4.25i + 3.165j

The magnitude of Displacement =| -4.25i + 3.165j |  = 5.3km

∴ Total displacement = 5.3km

A displacement is a vector in geometry and mechanics that have a length equal to the shortest distance between a point P's initial and final positions.  It measures the length and angle of the net motion, or total motion, in a straight line from the starting point to the destination of the point trajectory. The translation that links the starting point and the ending point can be used to spot a displacement.

The final location xf of a point relative to its beginning position xi, or a relative position (derived from the motion), is another way to express a displacement. The difference between the final and initial coordinates can be used to define the equivalent displacement vector.

To  learn more about displacement from the given link:

brainly.com/question/11934397

#SPJ9

4 0
2 years ago
After fixing a flat tire on a bicycle you give the wheel a spin. Its initial angular speed was 5.40 rad/s and it rotated 12.3 re
zaharov [31]

To solve this problem it is necessary to apply the concepts related to the kinematic equations of angular motion.

By definition, acceleration can be expressed as the change in angular velocity squared over a given period of distance traveled.

\alpha = \frac{\omega^2}{2\theta}

where,

\omega = Angular velocity

\theta = Angular displacement.

In turn, as a function of time, we can represent it as,

\alpha = \frac{\omega}{t}

For our case we have to,

\omega = 5.4rad/s

\theta = 12.3rev = 12.3rev(\frac{2\pi rad}{1rev})=24.6\pi rad

PART A) In the case of angular acceleration we have to,

\alpha = \frac{\omega^2}{2\theta}

\alpha = \frac{(5.4)^2}{2*24.6\pi}

\alpha = 0.1886rad/s^2

PART B) Through the definition of angular acceleration as a function of time we can calculate it,

\alpha = \frac{\omega}{t}

t = \frac{\omega}{\alpha}

t = \frac{5.4}{0.1886}

t = 28.63s

3 0
4 years ago
Metallic bonding generally occurs between
blsea [12.9K]
Metallic bondings occurs between metals (the metals delocalize their valance electrons and the attraction occurs between the now positive metals and the de localized sea of electrons)
8 0
3 years ago
How does a pith ball electroscope work
Mice21 [21]

Answer:

look at the explanation

Explanation:

This pith-ball electroscope is used to detect the presence of a static electricity charge. The two lightweight “pith” balls suspended from the strings are attracted to objects with a static electric charge. The pith balls can also be charged by touching them to an object with a static electric charge.

3 0
3 years ago
Two satellites orbit the Earth in circular orbits of the same radius. One satellite is twice as massive as the other. Which stat
loris [4]

To solve this problem it is necessary to apply the concepts related to the orbital velocity of a satellite on earth.

This concept is expressed in the equation,

v = \sqrt{\frac{Gm_E}{r}}

Where,

G = Universal Gravitational constant

m_E = Mass of the Earth

Therefore the ratio of the velocity from two satellites is,

\frac{v_1}{v_2} = \sqrt{\frac{r_2}{r_1}}

The ratio between the two satellites is the same, then

\frac{v_1}{v_2} = \sqrt{\frac{r}{r}}

\frac{v_1}{v_2} = 1

v_1 =v_2

Therefore the correct option is B.

4 0
3 years ago
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