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sladkih [1.3K]
2 years ago
15

We observe objects that move and notice changes that happen quickly. Which of the following would be most difficult to observe d

irectly with our eyes?
a fireworks display

burning wood

a temperature change

boiling water in a pot
Physics
1 answer:
lakkis [162]2 years ago
7 0

Answer:

a temperature change

Explanation:

In what circumstances is the real feel temperature higher than the actual temperature?” When humidity is high, the body is less able to cool itself by evaporation of sweat from the skin. High humidity increases not only the perceived temperature but may increase the body's core temperature.

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Thiết bị không phải nguồn điện:

Đáp án D

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How would the force of a test charge change if the electric field is doubled?
Stolb23 [73]
<span>The force would double.</span>
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The magnitude of electrical force between a pair of charged particles is ____ as much when the particles are moved half as far a
Gnesinka [82]

The magnitude of the electrical force between a pair of charged particles is 4 Times as much when the particles are moved half as far apart.

This can be easily understood by Columb's law,

F_{new} = \frac{kQ_{1}Q_{2}}{r^{2}}

which state's that the amount of electrical force experienced by two charged particles is inversely proportional to the square of the distance between them.

∴ \frac{F_{new} }{F_{old} } = \frac{Distance_{new}^{2}  }{Distance_{old}^{2}  }

Now, we know the new distance is half the original distance,

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F_{new} = 4F_{old}

The electrical force of attraction or electrostatic force of attraction between two charged particles refers to the amount of attractive or repulsive force that exists between the two charges. This can be calculated by Columb's Law.

A charged particle in physics is a particle that has an electric charge. It might be an ion, such as a molecule or atom having an excess or shortage of electrons in comparison to protons. The same charge is thought to be shared by an electron, a proton, or another primary particle.

Learn more about electrical force here

brainly.com/question/2526815

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If in 30 mins Alex runs to a store that is 4 km away, what is her average speed in km/h
masha68 [24]
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A statement made prior to an experiment, and based on little scientific evidence, is
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A- hypothesis
You usually write hypothesis in science it’s something that can usually be tested.

B- prediction
Made before you do an science experiment, they’re usually like what you think could happen or will happen.

C- theory
Theses aren’t used with scientific evidence, they’re usually things that people believe happened. Example: Some believe Big Foot is real. But no one will ever know because its a theory

D- is already been eliminated, not all are right.

Answer is A

Hope this helped :)
7 0
3 years ago
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