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DerKrebs [107]
4 years ago
9

Which of the following statements is true?

Physics
1 answer:
kupik [55]4 years ago
4 0

Answer:

2. The hydrogen atom has quantized energy levels.

Explanation:

The Bohr model of the atom states that the structure of the atom is quantized, that is, that electrons can only orbit the nucleus in specific orbits with a fixed radius. Therefore, the electron cannot be in energy levels that do not correspond to these quantized levels.

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2 years ago
An Olympic runner complete the 200 m sprint and 23 seconds. What is the runners average speed (round your answer to the nearest
kipiarov [429]
Should be 8.7 m/s. Just divide 200 by 23 and round from there.
3 0
3 years ago
Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 5.00 ✕ 10-5 kg hangs motionless on it.
Mandarinka [93]

Answer:

4.9 x 10⁻⁴N

Explanation:

Given parameters:

Mass of the vertical strand of spiderweb  = 5 x 10⁻⁵kg

Unknown:

Tension in the vertical strand  = ?

Solution:

The tension is the vertical strand will be the weight of the strand.

  Weight of strand  = mg

m is the mass

g is the acceleration due to gravity = 9.8m/s²

Tension in the vertical strand  = 5 x 10⁻⁵kg  x 9.8m/s²

Tension in the vertical strand  = 4.9 x 10⁻⁴N

3 0
3 years ago
Which statement best describes scientific laws? (1 point)
erica [24]

Answer:

The best statement would be scientific laws describe phenomenon that can be observed in nature. Sometimes, laws are related to principle defining and predicting a certain happening without explaining its nature. It is different with ‘hypothesis’ or ‘theory’ as it aims to answer only the ‘what’ (observation only)...

Explanation:

hopefully this is correct

3 0
3 years ago
The products of a chemical reaction can never have greater mass than the reactants
jek_recluse [69]
The answer to this is true
6 0
3 years ago
Read 2 more answers
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