Answer:
Satellites are placed into orbit at least 150km above Earth's surface to ensure that they remain above the atmosphere.
The velocity required to keep a balance between the inertia of the motion of the satellite and the earth's gravitational pull, which is called the orbital velocity, essentially depends on its distance above the surface of the Earth. The higher this distance, the longer the satellite will stay in the orbit. Otherwise it might run into the atmosphere and could get burnt up there.
b. medium.
c. sharing of meaning.
d. absence of noise.
Answer:
C. Sharing of the message
Explanation:
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Answer:
The new length is 1.20138 m
Explanation:
1- We get the increase in length:
The old length = 1.2 m
The coefficient of expansion of of aluminum is 23 * 10⁻⁶ /K.
The old temperature is 15°C.
The new temperature is 65°C
The increase in length= old length * coefficient of expansion *change in temperature
The increase in length = 1.2 * 23 * 10⁻⁶ * (65-15)
The increase in length = 0.00138 m
2- getting the new length:
new length = old length + increase in length
new length = 1.2 + 0.00138
new length = 1.20138 m
Hope this helps :)
B. a group of stars
C. an entire galaxy
D. one single planet
c. Carbon
b. Silicon
d. Lava
Answer:
A. Iron.
Explanation:
The Moon´s core is smaller in comparison with other terrestrial bodies. About 20% of the entire mass of it is the core.
The moon is composed of distinct crust, mantle, and core. While the crust is composed of freeze magma the core is believed to be formed by a mixture of metallic iron with a small amount of sulfur and nickel.
I hope this answer helps you.
Scientists believe the moon’s core might be formed of iron.
motion and light
electricity and motion
electricity and magnetism