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Alex
4 years ago
12

How was helium first discovered?

Physics
2 answers:
Olenka [21]4 years ago
7 0

Answer:

using spectral analysis of the Suns’ emission spectra

Explanation:

lora16 [44]4 years ago
3 0
I think it’s the third one idk tho
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True or false<br> Hydrogen fuel cells generate electricity by combining hydrogen with oxygen.
adoni [48]

Answer:

The answer is: True.

Explanation:

If free electrons or other substances could travel through the electrolyte, they would disrupt the chemical reaction. Whether they combine at anode or cathode, together hydrogen and oxygen form water, which drains from the cell. As long as a fuel cell is supplied with hydrogen and oxygen, it will generate electricity.

(Credit: Google)

7 0
3 years ago
What is equilibrium state​
anastassius [24]

Answer:

A state of rest or balance due to the equal action of opposing forces.

4 0
3 years ago
Read 2 more answers
Scientists are studying a moving glacier. To monitor the flow of the glacier, they place a series of five markers, A, B, C, D, a
Blababa [14]

Answer: c a d b

Explanation:

4 0
3 years ago
An airplane flying at 57 m/s releases a crate of supplies that lands 821 m from where it was released. How high was the plane fl
Mashutka [201]

Answer:1020

Explanation:

5 0
3 years ago
An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: ) KE=1/2mv squared
Julli [10]

Answer:15kg

Explanation:

kinetic energy=ke=480J

Velocity=v=8m/s

Mass=m

Ke=0.5 x m x v x v

480=0.5 x m x 8 x 8

480=32m

Divide both sides by 32

480/32=32m/32

15=m

Mass=15kg

5 0
3 years ago
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