The word atom comes from a Greek word that means “able to duplicate”.

1 answer:

3 0

<span>The statement, The word atom comes from a Greek word that means “able to duplicate”, is false. The greek word for atom is atomos. The a- in atom means “not” and –tom means “cut”. So it is not ot cut or it cannot be cut. It is common definition is indivisibility. This definition is defined by the philosopher Democritus. He observed that as he cut the sugar cube into smaller fraction, it reduces to nothing that cannot be seen in the eye. And so he proposed that definition.</span>

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Rahul has 2 bulbs connected across two cells in a simple circuits shown. How can he make the bulbs glow dimmer?

Ray Of Light [21]

Answer:

in the parallel connection the light bulbs shine less than in the series connection

Explanation:

In a series circuit the current through the whole circuit is the same, therefore the power (brightness) of each bulb is

P = i² R

where R is the resistance of each bulb and i the current of the circuit.

If we connect the light bulbs and the cells in parallel, the current in the circuit is the sum of the east that passes through each light bulb,

i = i₁ + i₂

if the two light bulbs are the same

i = 2 i₁

i₁ = i / 2

so the power of each bulb is is

P = i₁² R

P = R i² / 4

P = ¼ P_initial

Therefore we see that in the parallel connection the light bulbs shine less than in the series connection

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3 years ago

The Pressure in a liquid acts in ________ direction. The pressure _________ as you go deeper because the ______ of the water abo

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all directions

increases

uptrust

6 0

2 years ago

When using a calorimeter, the initial temperature of a metal is 70.4C. The initial temperature of the water is 23.6C. At the end

Sunny_sXe [5.5K]

1) 29.8 C

At the beginning, the metal is at higher temperature (70.4 C) while the water is at lower temperature (23.6 C). When they are put in contact, the metal transfers heat to the water, until they reach thermal equilibrium: at thermal equilibrium the two objects (the metal and the water have same temperature). Therefore, since the temperature of the water at thermal equilibrium is 29.8 C, the final temperature of the metal must be the same (29.8 C).

2) 6.2 C

The temperature change of the water is given by the difference between its final temperature and its initial temperature:

$\Delta T = T_f - T_i$