3 years ago

What is the numeric value of a mole for atoms or molecules?

Physics

1 answer:

Talja [164]3 years ago

5 0

Answer:

6.02×10²³

Explanation:

Mole measures the number of particles in a specific substance. The numeric value of a mole for atom or molecules is approximately 6.02×10²³ atoms or molecules.

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people used to think that the sun moved around earth galileo proved this was wrong why is this important

tamaranim1 [39]

To approve to people that the Catholic Church was wrong but they threatened Galileo and he stop

6 0

3 years ago

A 0.20-kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of

solmaris [256]

Answer:

$0.57 ms^{-1}$

Explanation:

k = spring constant of the spring = 40 Nm⁻¹

A = amplitude of the simple harmonic motion = 4 cm = 0.04 m

m = mass of the block attached to spring = 0.20 kg

w = angular frequency of the simple harmonic motion

Angular frequency of the simple harmonic motion is given as $w = \sqrt{\frac{k}{m} } \\w = \sqrt{\frac{40}{0.20} }\\w = 14.14 rads^{-1}$

$v$ = Speed of the block as it pass the equilibrium point

Speed of the block as it pass the equilibrium point is given as

$v = A w\\v = (0.04) (14.14)\\v = 0.57 ms^{-1}$

6 0

3 years ago

A substance has a mass of 2795 g and a volume of 312 cm

denis23 [38]

Answer:

if you are asking for density its 48g/cm^3

Explanation:

3 0

3 years ago

Which statement best describes the thermal properties of wool?

Evgen [1.6K]

<span>i believe the answer is
D. Wool is an excellent thermal insulator because heat flows through it very slowly.</span>

3 0

3 years ago

7. Two children of mass 20 kg and 30 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If th

Ainat [17]

Answer:

Explanation:

Given

mass of children $m_1=20\ kg$

$m_2=30\ kg$

distance between two children $L=3\ m$

suppose small child is at a distance of x m from pivot point

so torque of small child and heavier child must be equal

$20\times (x)=30\times (3-x)$

$2x=9-3x$

$5x=9$

$x=1.8\ m$

7 0

3 years ago