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4 years ago

which of the followng is a process promptef by a question, observation, conclusion inquiry or measerment

Physics

1 answer:

user100 [1]4 years ago

7 0

These are all followed and prompted by a question

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100 g of liquid nitrogen at its boiling point of 77 K is stirred into a beaker containing 500 g of 15°C water.

igomit [66]

Answer:

Option A: none

Explanation:

Specific heat capacity is the amount of heat energy required to raise the temperature of a substance per unit of mass.

From the question, the parameters given are; The heat of vaporization of nitrogen= 48 cal/g and that of water is 80 cal/g.

Using the formulae; Specific heat capacity,c= Q/ m× ∆T,----------–-----------------------------------------------------

STEP ONE: We will have to calculate all the energy numbers; 77k is approximately the boiling point of Nitrogen.

Energy required to decrease water from 15°C to 0°C = E(1).

0.1×10^3 g× 48 cal/gram..

= 4800 cal

Energy require to vaporize Nitrogen=E(2).

= 80 cal per gram×0.15(15-0)

= 180 cal

Energy required to decrease water from 15°C to 0°C is higher than that of the energy to vaporize Nitrogen, N2.

STEP 2: 180/4800× 15 = 0.5625

Therefore; 15-0.5625 =14.43

Answer= 14.43gC

8 0

3 years ago

Read 2 more answers

PLEASE HELP!!! Nico uses wire to connect a battery, a lightbulb, and a switch, but the bulb does not light up. Which might expla

Wewaii [24]

Its is C the answer is c lol

6 0

3 years ago

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PLEASE HELP NOW!! Which of the following must be the same for two isotopes of an element?

Masteriza [31]

B. The atomic number

7 0

4 years ago

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A lamp has a current of 2.17 A. In hours, how long does it take for 1 mole of electrons to pass through the lamp?

Gennadij [26K]

<u>Answer:</u> The amount of time needed for 1 mole of electrons to pass through the lamp is 12.33 hrs.

<u>Explanation:</u>

We are given:

Moles of electron = 1 mole

According to mole concept:

1 mole of an atom contains $6.022\times 10^{23}$ number of particles.

We know that:

Charge on 1 electron = $1.6\times 10^{-19}C$

Charge on 1 mole of electrons = $1.6\times 10^{-19}\times 6.022\times 10^{23}=9.6352\times 10^4C$

To calculate the time required, we use the equation:

$I=\frac{q}{t}$

where,

I = current passed = 2.17 A

q = total charge = $9.6352\times 10^4C$

t = time required = ?

Putting values in above equation, we get:

$2.17A=\frac{9.6352\times 10^4C}{t}\\\\t=\frac{9.6352\times 10^4C}{2.17A}=44402s$

Converting this into hours, we use the conversion factor:

1 hr = 3600 seconds

So, $44402s\times \frac{1hr}{3600s}=12.33hr$

Hence, the amount of time needed for 1 mole of electrons to pass through the lamp is 12.33 hrs.

3 0

3 years ago

What are the 3 parts of an atom and give the electric charge of each

xeze [42]

Proton
charge +

electron
charge -

neutron
charge neutral

3 0

3 years ago