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3 years ago

What are downbursts?

1 answer:

3 0

Downbursts are damaging winds<span> localized in an area which are caused by air that flows downward rapidly out from a thunderstorm. They can cause severe damage to infrastructures and can cause casualties when not prepared. This becomes worse as these types penetrate in areas near the ground. </span>

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The half-life of hydrogen-3 (tritium) is approximately 12 years. In how many years will half of a 20-gram sample decay by beta r

anyanavicka [17]

<h3>Answer:</h3>

12 years

<h3>Explanation:</h3>

We are given;

Half life of hydrogen-3 is 12 years

Initial mass of Hydrogen-3 is 20 grams

Final mass will be 10 g because we are told half of the sample will decay.

To find the time taken for the decay we need to know what half life is;

Half life is the time taken for a radioactive isotope to decay to half its original amount.

Using the formula;

Remaining mass = Original mass × 0.5^n

n = number of half lives

therefore;

10 g = 20 g × 0.5^n

0.5 = 0.5^n

n = log 0.5 ÷ log 0.5

= 1

But, 1 half life is 12 years

Therefore, the time taken is 12 years

4 0

3 years ago

Read 2 more answers

The thermometer in the picture reads, "19.9 degrees Celsius".

GalinKa [24]

Answer:

Sorry but i can't help

Explanation:

i need to really finesh s

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3 years ago

When the pH of an aqueous solution is 8, what is the OH- ion concentration in moles per liter?

Lilit [14]

Answer:

D. 12 is 1 × 10-6

Explanation:

8 0

3 years ago

What is human induced climate change

Marianna [84]

Answer:

Climate change that is caused by humans

5 0

3 years ago

Using the following information, what are the values of the exponents in the rate expression, rate = k[A]x[B]y

pashok25 [27]

Answer:

The correct option is;

A) x = 2, y = 1

Explanation:

Here we have

$k[0.05]^x \cdot [0.05]^y = 0.062 \ M/sec$ ....................(1)

$k[0.05]^x \cdot [0.10]^y = 0.123 \ M/sec$ ....................(2)

$k[0.100]^x \cdot [0.100]^y = 0.491 \ M/sec$ ..............(3)

From experiment (1), (2) it is observed that [A] is held constant and [B] is doubled of which the rate is also observed to be doubled, therefore, when you double a reactant which result in the rate being doubled, the order of the reaction with respect to the reactant is order 1, therefore, y = 1.

Similarly between reaction (2) and (3) when the concentration of the reactant B is doubled and A is held constant the rate of the reaction is multiplied by a factor of 4, therefore, the reaction with respect to that reactant is order 2, therefore, x = 2.

Therefore, the correct option is x = 2, y = 1.

3 0

3 years ago