Answer:
The increase in the internal energy is 1.840 x 10⁶ J.
Explanation:
Given;
mass of the water, m = 1000 g = 1 kg
temperature of the boiling water, t = 212 ° F = 100 ° C
latent heat of vaporization, L = 2.260 MJ/kg = 2.260 x 10⁶ J/kg
The internal energy of the boiling water is calculated as;
Q₁ = mcΔθ
where;
c is specific heat capacity of water, = 4200 J/kg.⁰C
Δθ is change in temperature = 100 ° C
Q₁ = 1 x 4200 x 100
Q₁ = 420,000 J
The internal energy of the vaporized steam is calculated as;
Q₂ = mL
Q₂ = 1 x 2.260 x 10⁶
Q₂ = 2,260,000 J
The increase in the internal energy is calculated as;
ΔQ = Q₂ - Q₁
ΔQ = 2,260,000 J - 420,000 J
ΔQ = 1,840,000 J
ΔQ = 1.840 x 10⁶ J
Therefore, the increase in the internal energy is 1.840 x 10⁶ J.
Iodine-131 has a half life of 8 days, so half of it is gone every 8 days.
10 grams of iodine-131 is left for 24 days.
At 8 days: 10/2=5 grams left
At 16 days: 5/2=2.5 grams left
At 24 days: 2.5/2=1.25 grams left.
**
Your mistake is that you stopped at 16 days.
Answer:
2805 °C
Explanation:
If the gas in the tank behaves as ideal gas at the start and end of the process. We can use the following equation:
The key issue is identify the quantities (P,T, V, n) in the initial and final state, particularly the quantities that change.
In the initial situation the gas have an initial volume
, temperature
, and pressure
,.
And in the final situation the gas have different volume
and temeperature
, the same pressure
,, and the same number of moles
,.
We can write the gas ideal equation for each state:
and
, as the pressure are equals in both states we can write
solving for
(*)
We know
= 935 °C, and that the
(the complete volume of the tank) is the initial volume
plus the part initially without gas which has a volume twice the size of the initial volume (read in the statement: the other side has a volume twice the size of the part containing the gas). So the final volume ![V_{f}= V_{i} + 2V_{i}=3V_{i}](https://tex.z-dn.net/?f=V_%7Bf%7D%3D%20V_%7Bi%7D%20%2B%202V_%7Bi%7D%3D3V_%7Bi%7D)
Replacing in (*)
1. Meter Rule
Meter rule is used to measure the small length or distance between any two points.
2. Measuring Tape
It is also use to measure length and distance in meters and centimeters.
3. Vernier calipers.
It can be use to measure small diameter or radius of objects up-to 10th part of a millimeter.
4. Micrometer screw gauge.
It is also use to measure diameter or radius unto 100th part of a millimeter.
5.Beam balance
It is use to measure mass upto 10th part of a gram.
6. Physical balance
it is use to measure mass upto 100th part of a gram.
7.Electronic balance
It is use to measure mass upto 100th part of a gram.
8. Stop watch.
It is use to measure time upto 10th and 100th part of a second.
9.Measuring cylinder
It is use to measure volume of a small object.
10. Hydrometer
It is use to measure density of liquids.
11. Barometer.
It is use to measure the atmospheric pressure.
12. Thermometer
It is use to measure temperature.
13. Ammeter
It is used to measure amount of electric current in circuit.
14.Photometer.
It is use to measure intensity of light.
15. Protector,.
It can be use to measure angle.
16. Lactometer.
It can be use to measure specific gravity of milk.
The kinetic energy should be 1,102.5 joules.