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3 years ago

Define quant......am physics

Physics

2 answers:

Bas_tet [7]3 years ago

7 0

Answer:

<h2><u>✍</u><u> </u><u>What is quantum physics?</u></h2>

➳ It's the physics that explains how everything works; the best description we have of the nature of the particles that make up matter and the forces with which they interact.
Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.

ruslelena [56]3 years ago

4 0

quantum = It is a science that studies the behavior of matter and light at the atomic and subatomic levels.

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Organisms have very few parts that are not useful to the organism. This is because

lidiya [134]

Answer:

Those parts have become vestigial

Explanation:

Organisms have few parts that are not useful to them because those parts in them have become vestigial.

When an organism has a part is no more using, it relates to the evolutionary history of such organism.

These parts are called vestigial body parts.
They are not needed for the survival of an organism again and they can do without them.
At a certain point in time, those parts might be very vital to the sustenance of such organism.
With time, those parts becomes useless and redundant.

6 0

3 years ago

A stone is thrown straight up from the ground with an initial speed of 44 m/s.At the same instant, a stone is dropped from a hei

Lubov Fominskaja [6]

Answer:

394.26 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

$v=u+at\\\Rightarrow 0=44-9.8\times t\\\Rightarrow \frac{-44}{-9.8}=t\\\Rightarrow t=4.49 \s$

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=44\times 4.49+\frac{1}{2}\times -9.8\times 4.49^2\\\Rightarrow s=98.77\ m$

$s=ut+\frac{1}{2}at^2\\\Rightarrow 98.77=0t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow t=\sqrt{\frac{98.77\times 2}{9.8}}\\\Rightarrow t=4.49\ s$

Total time taken by the stone to reach the ground is 4.49+4.49 = 8.97 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow h=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{h\times 2}{9.8}}$

The times are equal so,

$8.97=\sqrt{\frac{h\times 2}{9.8}}\\\Rightarrow h=\frac{8.97^2\times 9.8}{2}\\\Rightarrow h=394.26\ m$

The height is 394.26 m

6 0

3 years ago

a speed of 30 cm per second means the cart moves 30 cm every second. What was the final speed of the cart?

Mnenie [13.5K]

Answer:

SI EL COCHE SE MUEVE A VELOCIDAD CONSTANTE, LA VELOCIDAD

FINAL DEL COCHE ES LA MISMA 30 cm/s

Explanation:

3 0

3 years ago

What is mean by the value of universal gravitional constant is 6.67×10^-11

aev [14]

Answer:

According to the gravitational law of Isaac Newton, "the gravitational force between any two objects is proportional to the product of the objects’ masses and inversely proportional to the square of the separation between their centers".

Therefore gravitational constant is the proportionality constant used in Newton’s Law of Universal Gravitation, and is commonly denoted by G. It is expressed as:

F= Gm1m2/r2

Another scientist Cavendish was able to measure the gravitational force and the value of the proportionality constant. It is expressed as G = 6.673×10-11 N m2 kg-2.

8 0

3 years ago

Why are SI units helpful for describing objects? A. They are the standard used by scientists worldwide. B. They are more accurat

Ganezh [65]

They are the standard system used by scientists worldwide, and
officially by almost all nations of the world. So if you describe a
measurement in terms of SI units, there's less chance that you'll
need to explain the measurement to anyone who reads it ...
most scientists and common people worldwide will understand
what your number means.

7 0

3 years ago

Define quant......am physics​

Define quant......am physics