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3 years ago

13

Which statement best describes the difference(s) between atoms and molecules?

2 answers:

trasher [3.6K]3 years ago

8 0

Answer:

The answer is A

Explanation:

-Dominant- [34]3 years ago

3 0

Answer:

Atoms are the most basic units of an element whereas molecules are atoms that are chemically bonded together.

Explanation:

The atoms are made up of protons, neutrons, and electrons that are the basic constituents of matter.
The atoms occur in nature as single or bonded.
The inert gases are the atoms that they occur as the individual atoms in nature.
All other atoms in nature are bonded to the same elements or different elements and form molecules.
Hence, atoms are the most basic units of an element whereas molecules are atoms that are chemically bonded together.

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A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The ti

vichka [17]

To solve this problem we will apply the expression of charge per unit of time in a capacitor with a given resistance. Mathematically said expression is given as

$q(t) = e^{-\frac{t}{(R*C)}}$

Here,

q = Charge

t = Time

R = Resistance

C = Capacitance

When the charge reach its half value it has passed 10ms, then the equation is,

$\frac{1}{2}*q_{final} = e^{-\frac{0.01}{(R*C)}}$

$Ln(\frac{1}{2}) = -\frac{0.01}{RC}$

$- RC = \frac{0.01}{Ln(1/2)}$

$RC = 0.014s$

We know that RC is equal to the time constant, then

$T = RC = 0.014s = 14ms$

Therefore the time constant for the process is about 14ms

5 0

3 years ago

Calculate earth's mass given the acceleration due to gravity at the north pole is 9.830 m/s2 and the mean radius of the earth at

valentinak56 [21]

Answer: $M = 5.98\times 10^{24} kg$

Explanation:

We know that force acting on an object due to Earth's gravity on the surface is given by:

$mg = G\frac{Mm}{r^2}\\ \Rightarrow g = \frac{GM}{r^2}$

where g is the acceleration due to gravity, r would be radius of Earth, M is the mass of Earth and G is the gravitational constant.

It is given that at pole, g = 9.830 m/s² and r = 6371 km = 6371 × 10³ m

$\Rightarrow M = \frac{g\times r^2}{G}$

$M = \frac{9.830 m/s^2 \times (6371 \times 10^3 m )^2}{6.67 \times 10^{-11} m^3 kg^{-1} s^{-2}}$

$\Rightarrow M = 5.98\times 10^{24} kg$

Hence, Earth's mass is $5.98\times 10^{24} kg$

5 0

3 years ago

Which of the following scenarios represents the best use of a scientific model?

valkas [14]

Answer:

Predicting weather patterns is the answer :-)

Explanation:

4 0

3 years ago

Setler79 [48]

Answer:

This motion is known as Brownian motion.

Explanation:

This motion is known as Brownian motion.

5 0

3 years ago

Give two examples of motion related to civil engineering.<br>

krok68 [10]

rotational motion of a concrete mixer

linear motion of a tractor

is this what you mean

7 0

3 years ago