PHYSICS MIDDLE SCHOOL

Imagine you have a terrible cold. You have 2 Alka-Seltzer tablets and a glass of water. What could you do to increase the rate of the chemical reaction and get the medicine into your body as soon as possible?

Answers

Answer 1
Answer: possibly use warm water and stir

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Oceans receive freshwater from precipitation and rivers. Yet ocean levels do not change very much from these actions. Why are ocean levels not greatly affected?

Answers

Ocean levels are not greatly affected because when water is deposited or received from the ocean, at the same time water is being evaporated from the ocean to condense in the clouds and them form into precipitation.

Two reasons:

1).  Because oceans are big and deep, and have a lot of water in them,
while by comparison, rivers are narrow, shallow, and carry less water.
It's like using a hundred droppers to pour water into an olympic-size pool.
The level of the water in the pool doesn't change much.

2).  Because the sun shines on oceans, and tons of water evaporates
from them.  That's where the water comes from to make rain and snow,
and to keep the rivers full, so that they can keep flowing into oceans.
It's a cycle.  The same water flows into the oceans from the rivers,
then evaporates from the oceans, fills the rivers, and flows into the
oceans again . . . millions of times.

Archimedes' principle says that a 15 N object is buoyed up by a force that is

Answers

Answer:

  • equal to the weight of the fluid that the body displaces

Explanation:

Archimides' principle states the definition of buoyant force.

These are the imporant features of the buoyant force that you need to know:

  • Except for the very special vacuum condition, every body is immersed in a fluid.

  • The body is subject, at least, to two forces, its weight and the buoyant force.

  • The weight is the result of the gravitational attraction exerted by the planet, and is equal to the mass of the object by the gravitational acceleration (approximately 9.8 m/s² on Earth). It is directed vertically downward.

  • The buoyant force is the vertical upward force that the fluid exerts on the object and is equal to the weight of the volume of fluid displaced by the object.

  • The volume of fluid that the body displaces is equal to the immersed volume of the body.

Answer:

an immersed object is buoyed up by force equal to the weight of the fluid it displaces

BRAINLIST | Why are there some areas of the country where wind power is not the best option?

Answers

Answer:

In contrast, wind turbines produce no greenhouse gases when generating electricity. We should note that both noise and visual pollution are environmental disadvantages of wind turbines. However, these factors don't have a negative impact on the earth, water table or the quality of the air we breathe.

what is required to bring about a phase change 1.an increase or decrease in pressure 2.an increase or decrease in energy 3.an increase in energy only 3.a decrease in energy only

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Answer: An increase or decrease in energy!

Explanation: I just took the quiz, I got it wrong with the increase or decrease of pressure. This is the right answer nowww.

Which answer best describes Earth's atmosphere

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surrounding because atmosphere is everything around you... so use surrounding

What is the velocity of a car that travels 100 meters north in for seconds

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The velocity is 25 because you just divide 100/4
The equation for velocity is distance/time.. So if it goes 100m in 4 seconds.. It's 100/4 which equals 25 mls north. (Velocity includes the direction in the answer)
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