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valina [46]
3 years ago
10

1) A common surface feature on the terrestrial planets is

Physics
1 answer:
Yanka [14]3 years ago
5 0
<span>1. A common surface features on the terrestrial planets is ___________.

Answer: A. Mountains and B. Volcanoes

2. Which scientist determined the planet's orbital shapes and sizes by triangulation?

Answer: C. Kepler

3. Scientists used the Keck telescope to learn more about the ______ located at the center of the Milky Way galaxy

Answer: A. star cluster

4. When the solar system formed, planetesimals collided and merged to form

Answer: A. Protoplanets

5) How is the heliocentric model of the solar system different than the geocentric model?

Answer: D. The heliocentric model has planets going around the sun; the geocentric model has planets going around Earth.</span>
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A small ball of charge Q and mass m has a velocity v at infinity. It collides head-on with a ball of the same charge and mass wh
Hatshy [7]

Answer:

Explanation:

Kinetic energy of ball in motion = 1/2 m v² . Potential energy = 0

Let the minimum distance between the balls be d  on collision.

Electric potential energy at that time= k Q²/d , Here kinetic energy is converted into potential energy . So

1/2 m v² = kQ²/d

d =2 k Q² / mv²,= 18 x 10⁹ x Q²/ m v².

8 0
3 years ago
The law of conservation of matter states that matter can neither be created nor destroyed. How is the law of conservation of mat
FromTheMoon [43]
<span>The law of conservation of matter and energy relates to the cycles in nature, and by that it is also applied to rocks and other materials.  All of the rock in the Earth is recycled and accounted for during the rock cycle. Rocks experience physical change, the composition of the material stays the same, it may just change how it looks and chemical changes occur (the suubstance undergoes a chemical reaction that changes the actual makeup of the substance).</span>
4 0
3 years ago
According to the table what was the hikers total displacement the graph has 4km 6km 4km 6km
Xelga [282]

Answer:

0

Explanation:

0 is the answer

6 0
2 years ago
Structures on a bird feather act like a diffraction grating having 8000 8000 lines per centimeter. What is the angle of the firs
sammy [17]

Answer:

Angle of first order maximum, \theta=21.19^{\circ}

Explanation:

Given that,

Wavelength of the light, \lambda=452\ nm=452\times 10^{-9}\ m

Number of lines, N = 8000 per cm

The relation between the number of lines and the slit width is given by :

d=\dfrac{1}{N}

d=\dfrac{1}{8000/cm}  

d=0.000125\ cm=1.25\times 10^{-6}\ m

The equation of grating is given by :

d\ sin\theta=n\lambda

n = 1

sin\theta=\dfrac{\lambda}{d}

sin\theta=\dfrac{452\times 10^{-9}}{1.25\times 10^{-6}}

\theta=21.19^{\circ}

So, the angle of the first-order maximum is 21.19 degrees. Hence, this is the required solution.

6 0
3 years ago
A body is electrically neutral. Does it mean that it has no charge?<br>​
vova2212 [387]

Answer:

If a body is electrically neutral it means it has no net charge.

Explanation:

Because it has the same number if protons as it does electron , which are opposite charges that offset eachother.

7 0
3 years ago
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