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Artemon [7]
3 years ago
11

I need all of these answered

Physics
2 answers:
LekaFEV [45]3 years ago
8 0

1. Answer: Light can travel in a vacuum, and its speed is constant if the source is moving or stationary.  

Light travels at constant speed in vacuum even if the source is moving or stationary. If the source is moving, the apparent frequency/ wavelength changes.

2. Answer:

Light travels at a constant speed through a vacuum, even if the light source is moving. If the source is moving, the apparent frequency/ wavelength changes.

3. Answer: Scientific laws are theories that have been tested, proven, and adopted as laws.  The scientific law does not provide full explanation of how a natural phenomenon occurs.

4. Answer: Scientific theories attempt to explain why natural events occur.  The scientific law does not provide full explanation of how a natural phenomenon occurs.

5. testable and observable.  In order for a concept to be considered as science, it should be testable and observable. Then only it can be ruled in or out of a scientific theory.

6. Ants live in colonies.

This is statement is scientific because it can be observed and proved.

7.Do vitamins help people stay healthy?

The above questions can be answered using a scientific method. The effect of lack of vitamins in diet can be observed on the health of a person.

8. Students gather to record their beliefs about paranormal activity.  Paranormal activities are not considered scientific because there is no scientific theory or law explaining this. Hence, this situation is pseudoscience.

9.Visit a local animal hospital.  This would help in investigating an experimental veterinary procedure closely with the veterinarians.

10. the Nuclear Regulatory Commission  would be exactly able to provide a reliable information about safety of nuclear power plants in the town.

11. The state will be able to weigh the benefits against the negative impact that the project might have in order to decide if it is safe to build the dam.  The environmentalists or biologists would study the impact of the dam on the local wildlife and create a report .



Travka [436]3 years ago
5 0
<span>1.Light waves can travel in a vacuum and will travel at a constant speed even if the light source is moving. 

2.</span><span>Light can travel in a vacuum, and the speed at which it travels changes if the source is moving.
</span>
3.Scientific laws are theories that have been tested, proven, and adopted as laws.

4.<span>Scientific theories attempt to explain why natural events occur.
</span>
5.<span>testable and observable.

6.</span><span>Ants live in colonies.

7.</span><span>Do vitamins help people stay healthy?

8.</span>Students gather to record their beliefs about paranormal activity.

9.
<span>Visit a local animal hospital

10.</span><span>the Nuclear Regulatory Commission

11.</span>the state will be able to weigh the benefits against the negative impact that the project might have in order to decide if it is safe to build the dam.
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A 100-kg object is moving at 20 m/s when a force brings the object to rest 3 points
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Answer:

0.5

Explanation:

By reducing the force, the time taken to stop the object increases, as they are inversely proportional.

Therefore, when a doubling of the time is observed, a halving of the force should be as well.

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The second law of thermodynamics states that all energy transformations result in more disordered energy. How can photosynthesis
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Answer:

The addition of energy form the sun known as solar energy to the reaction in other to yield glucose.

Explanation:

The second law of thermodynamics states that all matter affected by energy are becoming more random. Indicting that there is a continuous increase in the entropy of the universe.  

In other words as a system loses energy to its surroundings. it becomes more random or experiences an increase in entropy

According to the second law of thermodynamics glucose would break down into CO₂ and H₂O under ordinary conditions, rather than fpr CO₂ to combine with H₂O to form glucose.

However due to the energy added through sunlight, the CO₂ and H₂Oare able to combine to form glucose.

7 0
3 years ago
you stop the stopwatch at 4.0 s, but you notice a short time later that the same ant is at 0.81 m on the meter stick. Assuming t
telo118 [61]

The time elapsed since you stopped the stopwatch is 0.41 s.

<em>Your question is not complete, it seems to be missing the following information;</em>

"The velocity of the ant is 2 m/s"

The given parameters;

  • velocity of the ant, v = 2 m/s
  • change in position of the ant, Δx = 0.81 m
  • initial time, t₁ = 4 s
  • time when the ant was noticed, = t₂

Velocity is defined as the change in displacement per change in time of motion of an object.

v = \frac{\Delta x}{\Delta t} = \frac{\Delta x}{t_2 - t_1} \\\\t_2 -t_1 = \frac{\Delta x}{v} \\\\t_2 - 4 = \frac{0.81}{2} \\\\t_2 - 4 = 0.405\\\\t_2 = 0.405 + 4\\\\t_2 = 4.405 \approx 4.41 \ s

The time elapsed since you stopped the stopwatch is calculated as;

t_{elapsed} = 4.41 \ s - 4\ s = 0.41 \ s

Thus, the time elapsed since you stopped the stopwatch is 0.41 s.

Learn more here: brainly.com/question/18153640

5 0
3 years ago
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