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Leviafan [203]
3 years ago
5

Which is true for spectroscopy of a mixture?

Physics
1 answer:
Cloud [144]3 years ago
3 0

Absorbance of a mixture solution is additive. That mean the total absorbance at a perpendicular wavelength is the sum of the absorbance of its components at that wavelength.

This can be demonstrated through the sum of the absorbance in the solutions for which it is necessary to add to each specific absorbance its respective wavelength. Mathematically this is:

A_{total,\lambda} = \sum\limit_i A_{i,\lambda}

A_{total,\lambda} = A_{1,\lambda}+A_{2,\lambda}+A_{3,\lambda}+...

Therefore the correct option is A.

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Two devices with capacitances of 25 μf and 5.0 μf are each charged with separate 120 v power supplies. calculate the total energ
mash [69]
The energy stored in a capacitor is given by
U= \frac{1}{2} CV^2
where C is the value of the capacitance while V is the voltage difference applied to the capacitor.

Let's calculate the energy of the first capacitor:
U_1 =  \frac{1}{2} (25\cdot 10^{-6}F)(120 V)=1.5 \cdot 10^{-3}J

And now the energy of the second capacitor:
U_2 =  \frac{1}{2} (5 \cdot 10^{-6}F)(120 V)=3 \cdot 10^{-4}J

So, the total energy stored in the two capacitors is
U=U_1 +U_2 = 1.8 \cdot 10^{-3}J
3 0
3 years ago
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When friction occurs, which of the following types of energy is produced?
sukhopar [10]

Answer:

heat energy

Explanation:

Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.

8 0
2 years ago
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How many types air<br>I need a formula of calculating the s i unti of force​
yKpoI14uk [10]

The si unit of force is newton.

so, F is eqal to m*g

4 0
3 years ago
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3) What is the weight of an object with a mass of 5.2 kilograms?​
inna [77]

Answer:

50.96 N

Explanation:

weight = mass x gravity

We know that gravity = 9.8 m/s^2 and mass = 5.2 kg.

w = m x g

w = 5.2 kg x 9.8 m/s^2

w = 50.96 N

The weight of the object is 50.96 N (newtons). Hope this helps, thank you !!

8 0
3 years ago
A long solenoid (1000 turns/m) carries a current of 25 mA and has an inside radius of 2.0 cm. A long wire which is parallel to a
vampirchik [111]

Answer:

B = 0.031T

Explanation:

Given n1 = 1000turn/m

i1 = 25A

μo = 4π ×10‐⁷ Wb/A•m

B1 = μo×i1×n1

B1 = 4π ×10‐⁷ × 25 × 1000 = 0.031T.

6 0
3 years ago
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