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ivanzaharov [21]

2 years ago

7

Can The collision of continental plates can push up a mountain range, after which weathering and erosion begins?

1 answer:

Varvara68 [4.7K]2 years ago

8 0

Answer:

penultimate or senile stage

Explanation:

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This is a measure of mass per unit volume.

il63 [147K]

Answer:

Density

Explanation:

Density is defined as the mass per unit volume. It is the ratio between the mass and the volume of a substance. It does not matter how large or small a sample of matter is, the same substance will always have the same density, because of this. The ratio between the mass and volume remains the same.

8 0

3 years ago

The concentration of Rn−222 in the basement of a house is 1.45 × 10−6 mol/L. Assume the air remains static and calculate the con

bonufazy [111]

<u>Answer:</u> The concentration of radon after the given time is $3.83\times 10^{-30}mol/L$

<u>Explanation:</u>

All the radioactive reactions follows first order kinetics.

The equation used to calculate half life for first order kinetics:

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

We are given:

$t_{1/2}=3.82days$

Putting values in above equation, we get:

$k=\frac{0.693}{3.82}=0.181days^{-1}$

Rate law expression for first order kinetics is given by the equation:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

where,

k = rate constant = $0.181days^{-1}$

t = time taken for decay process = 3.00 days

$[A_o]$ = initial amount of the reactant = $1.45\times 10^{-6}mol/L$

[A] = amount left after decay process = ?

Putting values in above equation, we get:

$0.181days^{-1}=\frac{2.303}{3.00days}\log\frac{1.45\times 10^{-6}}{[A]}$

$[A]=3.83\times 10^{-30}mol/L$

Hence, the concentration of radon after the given time is $3.83\times 10^{-30}mol/L$

7 0

3 years ago

Why can Sirius be seen in the night sky?<br> Thank you who ever answers

ra1l [238]

Answer:

Because the star has a higher luminosity/intrinsic brightness than other stars.

7 0

3 years ago

When a substance melts it is said to go through all of the following except:

Alex Ar [27]

C. Chemical change because it doesn’t change it chemical makeup but it will change temps it’s physical appearance and phase change or change of state

4 0

3 years ago

Read 2 more answers

PLEASE HELP!!!! ILL GIVE BRAINLIEST HELP ASAP

kap26 [50]

I learned this in class! the answer is c

The myosin filaments remain in place as they pull the actin filaments inward!

7 0

3 years ago