PHYSICS MIDDLE SCHOOL

By what factor would you need to adjust the length of a pendulum to make the period of 1/2 of what it used to be?

Answers

Answer 1
Answer:

Answer:

1/4

Explanation:

The period of a simple pendulum is:

T = 2π √(L/g)

At half the period:

T/2

= π √(L/g)

= 2π √(L/(4g))

= 2π √((L/4)/g)

So the length would have to be shortened by a factor of 1/4.

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What function do capillaries serve in the cardiovascular system?A.
carry blood to the brain
B.
return blood to the lungs
C.
help control body temperature
D.
replace old blood cells

Answers

Hey there! 
The correct answer to the question is B) return blood to the lungs.

Capillaries are the smallest blood vessels in our body. Capillaries allow the exchange of water, oxygen, carbon dioxide, nutrients, minerals, and wastes in the body. 

Thank you for being part of the Brainly community! :D

Answer:

Its C

 I hope this helps!!!

What happens to lights reflected angle when passing through glass?

Answers

It bends or refracts

Answer:

Refraction of light occurs when light is passed through something. Have you ever seen a rainbow light effect through a window? That is light refraction, where light bends! :)

Can someone help me ASAP!!!! why does the united states still use the english system for everyday measurements which of the following is not a reason for worldwide use of the metric system instead

Answers

The US English System of measurement grew out of the manner in which people secured measurements using body parts and familiar objects. For example, shorter ground distances were measured with the human foot and longer distances were measured by paces, with one mile being 1,000 paces. Capacities were measured with household items such as cups, pails (formerly called gallons) and baskets.

Name three types of electromagnetic radiation that can travel through empty space

Answers


ALL electromagnetic radiation can travel through empty space.
A few examples are:

-- radio
-- heat
-- visible light
-- ultraviolet
-- X-rays

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.

Why are most cells 70 percent water?

Answers

Cells are the units that together make the organism. Most of the cells are 70% water as it is the most abundant molecule that makes the cytoplasm and organelles.

What is a cell?

A cell is a structural organization that is composed of various organic, and inorganic substances that also have water as the most abundant molecule. It is the most important component that is needed for cellular and metabolic reactions.

It makes the cytoplasm of the cell that occupies most of the cell portion. Water is the most important reactant and the product of the photosynthesis and respiration processes of plant and animal cells.  Water is needed by the cell to transport the nutrients and the waste, and even in cell signaling.

Therefore, cells are made of 70% water as the component.

Learn more about cell here:

brainly.com/question/15228343

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because most of the chemical reactions that happen in your metabolism happen in water.
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