Answer:
IT PROVIDES MECHANICAL ENERGY
Explanation:
Turbine is a rotatatory device that provides energy from a working fluid and converts it into mechanical energy useful for the generation of electrical energy when combine with an alternator or generator.
It is used in the production of electricity. It begins from the action of a Reactor which provides energy from large radio-active isotopes as they undergo nuclear fission. The energy produced by the Reactor is used to rotate the turbine which provides the mechanical energy needed to transfer energy from a working fluid to the generator. The generator then provides the electrical energy for transmission.
The carrot is a biennial plant in the umbellifer family Apiaceae
Answer:
B) 271 g.
Explanation:
- It is known that the decay of a radioactive isotope isotope obeys first order kinetics.
- Half-life time is the time needed for the reactants to be in its half concentration.
- If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).
- Also, it is clear that in first order decay the half-life time is independent of the initial concentration.
- The half-life of As-76 = 26.0 hours.
- For, first order reactions:
<em>k = ln(2)/(t1/2) = 0.693/(t1/2).</em>
Where, k is the rate constant of the reaction.
t1/2 is the half-life of the reaction.
∴ k =0.693/(t1/2) = 0.693/(26.0 hours) = 0.02665 hour⁻¹.
- Also, we have the integral law of first order reaction:
<em>kt = ln([A₀]/[A]),</em>
where, k is the rate constant of the reaction (k = 0.02665 hour⁻¹).
t is the time of the reaction (t = 538 min = 8.97 hour).
[A₀] is the initial concentration of (As-76) ([A₀] = 344 g).
[A] is the remaining concentration of (As-76) ([A] = ??? g).
∴ (0.02665 hour⁻¹)(8.97 hour) = ln((344 g)/[A])
∴ 0.239 = ln((344 g)/[A]).
- Taking exponential for both sides:
∴ 1.27 = ((344 g)/[A]).
∴ [A] = (344 g)/(1.27) = 270.88 g ≅ 271 g.
- So, the right choice is: B) 271 g.
Answer:
C. sea water
Explanation: basically when you see words that look like someone sneezed and whatever they managed to type (example: Copernicium) just go ahead and eliminate it when it comes to mixtures. Distilled water was there to trick you. Always look for the distilled part, that means it is pure, and therefore not a mixture.