PHYSICS MIDDLE SCHOOL

We all know that in the earth gravity is there,but why clouds doesn't fall down???​

Answers

Answer 1
Answer:

Answer: Clouds are evaporated sea water. You should be asking "Why does the gravity on Earth pull us down and not evaporated water.

Explanation:
Answer 2
Answer:

Answer:

Because of their mass

Explanation:

Clouds are made of water right ? so you are asking why they don't fall down if air is lighter than water .

The two biggest reasons the clouds stay in the sky are

1. Small Drops

2. Wind

Small drops of water fall more slowly than big drops, as the drops of the clouds fall thought the air, the air pushes back to them, because Small drops has less mass than large drops, clouds can only contain small drops of water.

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A material that does not allow heat to be transferred to a easy is known as

Answers

Answer:

an insulator

Explanation:

Examples: Plastic, rubber, etc.

A conductor would be the opposite of an insulator like metal.

Which of these is studied using science? a. thirteen is an unlucky number
b. finding a four leaf clover is lucky
c. breaking a mirror brings bad weather
d. sudden fall in air pressure affects weather

Answers

d. sudden fall in air pressure affects weather...common man

Answer:

Duhhh... It's d.

Explanation:

Can you guy pleas answer this questions4. Would you expect a substance to be a solid, liquid, or gas at absolute
zero? Explain your answer.
5. Describe what happens, at the molecular level, during melting.
6. Describe what happens, at the molecular level, when a substance boils.
7. What is the most common phase of matter in the universe?
8. What is plasma? Where can you find plasma?

Answers

Lets start off with know body knows. But say that someone did know lat just speculate, at this very low temperature things can become very strange. things that cannot be explained. That is your literal best answer. If you want something else watch "The coldest place in the universe"

The electromagnet shown below is made up of a coil of electrical wire wrapped around an iron core.Which of the following would decrease the strength of this electromagnet?

A adding batteries to the circuit
B removing its iron core
C increasing the current through the coil
D increasing the number of wire loops in the coil

Answers

Answer:

B. Removing its iron core

Explanation:

In an electromagnet role of its core is very important as it concentrate magnetic flux to make magnetic field more powerful. Generally core of electromagnet is made up of a ferromagnetic material or of a ferrimagnetic material such as iron. Adding batteries to the circuit and increasing the current through the coil and increasing loops in the coil will increase magnetic  strength of an electromagnet.

Answer:

B. removing its iron core

Explanation:

The iron core inside of the wire coil increases the strength of an electromagnet. So removing the iron core would decrease the strength of an electromagnet.

A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the person's hand at -5.0 m/sec, what was its velocity on impact?

Answers

The acceleration of gravity on Earth is 9.8 meters per second every second.  So
in 1.1 second of falling, an object gains (9.8 x 1.1) = 10.78 meters per second of
downward speed.

The balloon was already falling at 5 m/sec when the time began, and it gained
another 10.78 m/sec on the way.  So at the end of 1.1 second, its downward
speed was (5.0 + 10.78) = 15.78 m/sec.

Its velocity was 15.78 m/sec downward. 

How do ants use formic acid to stay alive

Answers

"When the crazy ants were dabbed with fire ant venom, they would go off and do this ... arid soils or severe freezes, that will be too harsh for them to survive.
Invasive “crazy ants” are rapidly displacing fire ants in areasacross the southeastern US by secreting a compound that neutralizes theother’s venom.It’s the first known example of an insect having the ability to detoxify another insect’s venom, researchers say.The crazy ant invasion is the latest in a series from the southernhemisphere and, like its predecessors, will likely have dramatic effectson the region’s ecosystems. Known for their painful stings on humansand other animals, fire ants dominate most ant species by dabbing themwith powerful, usually fatal venom. A topical insecticide, the venom istwo to three times as toxic as DDT on a per weight basis.invasive filesBut when a crazy ant is smeared with the venom, it begins anelaborate detoxification procedure—it secretes formic acid from aspecialized gland at the tip of its abdomen, transfers it to its mouth,and then smears it on its body.In lab experiments, exposed crazy ants that were allowed to detoxifythemselves had a 98 percent survival rate. This chemical counter-weaponmakes crazy ants nearly invincible in skirmishes with fire ants overfood resources and nesting sites. The research is published in thejournal science express.“As this plays out, unless something new and different happens, crazyants are going to displace fire ants from much of the southeastern USand become the new ecologically dominant invasive ant species,” says EdLeBrun, a research associate with the Texas invasive species researchprogram at the Brackenridge Field Laboratory at the University of Texasat Austin.Researchers have previously reported that where crazy ants take hold,the numbers and types of arthropods—insects, spiders, centipedes, andcrustaceans—decrease, which is likely to have a ripple effect onecosystems by reducing food sources for birds, reptiles, and otheranimals. They also nest in people’s homes and damage electricalequipment.
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