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omeli [17]
4 years ago
12

What object best represents a true scale model of the shape of earth?

Physics
1 answer:
BabaBlast [244]4 years ago
6 0
Any object that is spherical in shape would best represent a true scale model of the shape of the Earth. Examples are ping pong balls, billiard balls, marble and other smooth spherical objects. The shape of the Earth is called the oblate spheroid. The "oblate" would refer to an oblong shape and "spheroid" would refer to an almost spherical shape. The earth has on almost spherical shape and has a slightly oblong appearance. The diameter from the South pole to the north pole was measured to have a value of 12714 km while the diameter of the equator is approximately 12756 km. As you can see, the values are not equal. This makes the earth not a perfect sphere.
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Explain the law of inertia in your own words.
natita [175]

A

An object at rest will remain at rest unless acted on by a force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by a force.

Explanation:

6 0
3 years ago
Read 2 more answers
A volumetric flask made of Pyrex is calibrated at 20.0°C. It is filled to the 150-mL mark with 34.5°C acetone. After the flask i
8_murik_8 [283]

Answer:149.73 ml

Explanation:

Given

\beta \ of\ acetone=1.50\times 10^{-4} ^{\circ}C^{-1}

change in volume is given by

\Delta V=V_{final}-V_{initial}

\Delta V=\nu_{initial}\beta _{acetone}\left [ T_f-T_i\right ]

V_{final}=\nu_{initial}+\nu_{initial}\beta _{acetone}\left [ T_f-T_i\right ]

V_{final}=150+150\times 1.50\times 10^{-4}\left [ 20-32\right ]

V_{final}=149.73 ml

3 0
3 years ago
If Paula travels 3 km south and turns and goes 4 km east, what is the total displacement? What is the total distance? Please Exp
Ulleksa [173]
N
W E
S
Paula has gone 1 km east as the total displacement. The total distance would be 7 km. Why? Well, the difference between displacement and distance is displacement is directional which is why it’s included in velocity and not speed. However, distance is more broad and not as specific.
3 0
3 years ago
An electron with charge −e and mass m moves in a circular orbit of radius r around a nucleus of charge Ze, where Z is the atomic
shepuryov [24]

Answer:

v=\sqrt{\frac{kZe^2}{mr}}

Explanation:

The electrostatic attraction between the nucleus and the electron is given by:

F=k\frac{(e)(Ze)}{r^2}=k\frac{Ze^2}{r^2} (1)

where

k is the Coulomb's constant

Ze is the charge of the nucleus

e is the charge of the electron

r is the distance between the electron and the nucleus

This electrostatic attraction provides the centripetal force that keeps the electron in circular motion, which is given by:

F=m\frac{v^2}{r} (2)

where

m is the mass of the electron

v is the speed of the electron

Combining the two equations (1) and (2), we find

k\frac{Ze^2}{r^2}=m\frac{v^2}{r}

And solving for v, we find an expression for the speed of the electron:

v=\sqrt{\frac{kZe^2}{mr}}

6 0
3 years ago
How are the mass and weight of an object related? Weight equals mass plus the acceleration due to gravity. Mass equals weight mu
Elanso [62]

Weight equals mass multiplied by the acceleration due to gravity.

5 0
4 years ago
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