Do you hear sound as soon as it's made? explain?

Answers

Answer 1
Answer:
No you don't.  After the sound is made, it has to travel
to your ears before you can hear it. 

The speed of sound in air is about 340 meters per second. 
That's about 760 miles per hour.  That sounds awfully fast, but
it means that it takes sound almost 5 seconds to cover 1 mile.

Sometimes when you're outside, you might see a neighbor
down the street doing some carpentry outside his house, or
you may see some workers putting a new roof on a house nearby. 
If you have this opportunity, watch their hammers carefully. 

Light travels much much much much much faster than sound ...
about 874 thousand times as fast as sound.  So you see things
just about as soon as they happen, but it takes the sound a while
to reach you.  If the distance is about 34 meters (about 110 feet)
or more, then you can start to see the difference ... you'll see the
hammer hit, and then you'll hear it.  The farther the distance is,
the longer the delay is.

The same thing happens at a baseball game when the batter
connects.  Firstyou see the ball hit the bat and fly away, and
thenyou hear the CRACK !


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Question 1Which compounds are both classified as electrolytes?

If the mass is 180g and the volume is 90g what is the density

Answers

The volume can't be 90g.

What is the biggest problem with invasive species in their new location?A They are always stronger than native species.

B They evolve more quickly than native species.

C They have higher reproductive rates than native species.

D They have no population controls such as predators.

Answers

Answer:

Option (C)

Explanation:

Invasive species usually refer to those species that are new to an ecosystem and cause a great impact on the native species. It also affects the ecosystem, economy and the health of human beings. Examples of some invasive species are zebra mussels, killer algae, green crab and Asian carp.

These species are much stronger than the native species and they have the ability to grow at a much faster rate, increasing their population. This increasing rate of population creates a problem for them to survive in a new location.

Thus, the most appropriate answer is option (C).

Answer:

D

Explanation:

The other species had evolved to be able to survive the predators of the area over the years

What is electronegativity?An atom's ability to attract other electrons and form a chemical bond
A type of electricity only found in some atoms
The total number of electrons in an atom
so
A property of electrons that give them a negative charge​

Answers

Answer: An atom's ability to attract other electrons and form a chemical bond

Explanation:

The electronegativity of an atom tells of its power to attract electrons. Electronegativity values of elements ranges from 0 to 4.0, a high value means higher ability to attract electrons while a lower value means lower ability to attract electrons. Also, a wider difference in electronegativity between two atoms gives an ionic bond unlike a covalent bond with narrow difference.

Thus, nonmetals like chlorine higher electronegativities than metals like potassium.

Answer:

An atom's ability to attract other electrons and form a chemical bond

Explanation:

I took the test and got the answer right

What is air resistance a form of? Define air resistance

Answers

Answer:

By definition, air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. These drag forces act opposite to the oncoming flow velocity, thus slowing the object down.

Explanation:

What is the SI unit used to express gravitational potential energy?A.Newton
B.Kilowatt
C.Horsepower
D.Joule

Answers

The SI unit used to express gravitational potential energy is Joule.
Correct Answer D.Joule

A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4.00 meters/second2. How long does it take the bike to reach the final velocity?

Answers

35-20 = 15m/s difference
15/4 = 3.75 seconds