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WITCHER [35]
3 years ago
11

. What is the atomic number for calcium?

Physics
1 answer:
zheka24 [161]3 years ago
8 0
20 is the atomic number for Calcium.
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Intersystem crossing is:
Semenov [28]

An intersystem crossing (ISC) is a non-radiative process that involves the transition between two electronic states with different spin multiplicity. That is, when an electron is excited in a molecule in a basal singlet state (either by absorption or radiation) into a state of greater energy, an excited singlet or triplet state can be obtained.

Therefore, ISC is understood as an a non radio active transition between states with different spin multiplicity.

Correct answer is C:  a radiative transition between states with the same spin.

8 0
4 years ago
Which method would be best to separate a mixture of iron and lead pellets (of the same approximate diameter)? magnetism screenin
KATRIN_1 [288]
Separation by density filtration because lead slightly interacts with magnets also.
4 0
3 years ago
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lf an object's velocity changes from 25 meters per second to 15 meters per second in 2.0 seconds, the magnitude of the object's
Mila [183]

Answer:

-5 m/s^2

Explanation:

acceleration =  \frac{change \: in \: velocity}{time}  \\  \\  =  \frac{15 - 25}{2}  \\  \\  =  \frac{ - 10}{2}   \\  \\  =  -  5 \: m {s}^{ - 2}  \\  \\ negative \: sign \: represents \: that \:  \\ object \: is \: slowing \: down.

6 0
3 years ago
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What is moral science?
Lelu [443]

Moral science is social sciences or philosophy.


That's it, really!


5 0
4 years ago
A student sets a board to pivot about its center. The student then places a box with mass m at some position r from the pivot po
kvv77 [185]

Answer:

The box should be placed at a distance of \frac{r}{2} from the pivot

Explanation:

In order to be in static equilibrium, both Torques have to be the same magnitude, so:

T_{m} = T_{2m}   Replacing the formula for Torque:

m*r = 2m*X   where X is the distance we need to find.

Solving for X we get:

X = \frac{r}{2}

As we can see, the distance does not depend on the actual value of the mass but on the fact of one being twice as much as the other one.

7 0
4 years ago
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