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olga nikolaevna [1]
3 years ago
15

What techniques allow us to identify the presence of different elements?

Physics
2 answers:
lyudmila [28]3 years ago
7 0
If unknown compound is crystalline solid,X-ray diffraction technique is best for elucidating the structure. In case the compound is liquid, use of combind IR, UV, Mass and NMR techniques are sufficient in solving the structure.
boyakko [2]3 years ago
4 0

Answer:

c

Explanation:

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It's cyan.  I believe it's because it has green and blue in it.
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Does the mass of a pendulum affects the period of oscillation
pshichka [43]
Mass does not affect the pendulum's swing. The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls; and therefore, the longer the period.
8 0
3 years ago
A light horizontal spring has a spring constant of 138 N/m. A 3.35 kg block is pressed against one end of the spring, compressin
BARSIC [14]

Answer:

U_k = 0.113

Explanation:

using the law of the conservation of energy:

E_i -E_f=W_f

\frac{1}{2}Kx^2=NU_kd

where K is the spring constant, x is the spring compression, N is the normal force of the block, U_k is the coefficiet of kinetic friction and d is the distance.

Also, by laws of newton, N is calculated by:

N = mg

N = 3.35 kg * 9.81 m/s

N = 32.8635

So, Replacing values on the first equation, we get:

\frac{1}{2}(138)(0.123)^2= (32.8635)U_k(0.281m)

solving for U_k:

U_k = 0.113

8 0
3 years ago
Which subatomic particle can be absent from an atom?
Alika [10]
Neutron can be absent 
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3 years ago
Which of the following is the largest unit?<br> Hectogram<br> Dekagram<br> Decigram<br> Microgram
MAXImum [283]

Answer:

So far it seems that hectogram us the largest unit.

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Hectogram is a metric unit of mass equal to 100 grams.

Decigram is  a metric unit of mass and weight equal to ¹/₁₀ gram.

Microgram is a metric unit of mass equal to one millionth of a gram.

8 0
3 years ago
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