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3 years ago

HELP PLZ ASAP... I'M CONFUSED :(

2 answers:

8 0

B. In forward-biased setup, large numbers of charge carriers will be pulled across the junction and result in a large current.

Snowcat [4.5K]3 years ago

6 0

D. In forward-biased setup, large numbers of charge carriers will be pulled across the junctions and result in a large current

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PLEASE HELP ME I DONT EVEN KNOW IF I CIRCLES THE RIGHT THING!!

antoniya [11.8K]

Answer:

why are anime and cartoons awesome? wt..f

Explanation:

I dont got that are you serious or making fun?

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3 years ago

The amount of a harmful chemical to which a person is exposed is the ____.

kotykmax [81]

A. dose
a dose is an amount, a response is an action, and pollutant and toxins are substances

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3 years ago

Read 2 more answers

An archaeologist graduate student found a leg bone of a large animal during the building of a new science building. The bone had

Vlad [161]

Answer : The time passed in years is $2.74\times 10^2\text{ years}$

Explanation :

Half-life of carbon-14 = 5730 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{5730\text{ years}}$

$k=1.21\times 10^{-4}\text{ years}^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{ years}^{-1}$

t = time passed by the sample = ?

a = initial amount of the reactant disintegrate = 15.3

a - x = amount left after decay process = 14.8

Now put all the given values in above equation, we get

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{15.3}{14.8}$

$t=274.64\text{ years}=2.74\times 10^2\text{ years}$

Therefore, the time passed in years is $2.74\times 10^2\text{ years}$

4 0

3 years ago

7. A 26.4-ml sample of ethylene gas, C2H4, has a pres-sure of 2.50 atm at 2.5°C. If the

never [62]

Answer: 1.87 atm

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 2.50 atm

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = 26.4 ml

$V_2$ = final volume of gas = 36.2 ml

$T_1$ = initial temperature of gas = $2.5^oC=273+2.5=275.5K$

$T_2$ = final temperature of gas = $10^oC=273+10=283K$

Now put all the given values in the above equation, we get:

$\frac{2.50\times 26.4}{275.5}=\frac{P_2\times 36.2}{283}$

$P_2=1.87atm$

The new pressure is 1.87 atm by using combined gas law.

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3 years ago

How does the temperature of the air change with altitude?

TiliK225 [7]

As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.

8 0

3 years ago