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kobusy [5.1K]
2 years ago
7

Each element has its own emission and absorption lines. What is the best explanation for this?

Physics
1 answer:
k0ka [10]2 years ago
3 0

D. Each element has unique energy levels.

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What is efficiency?<br>​
tatyana61 [14]

Explanation:

the state or quality of being efficient or able to accomplish something

5 0
3 years ago
The momentum of an object is determined to be 7.2 X 10-3 kg m/s. Express this quantity as provider or use any equivalent unit.
olasank [31]

There could be more than just one answer, since kilograms can be converted to grams, to miligrams, etc.

7.2\frac{g.m}{s}

or

7200\frac{mg.m}{s}

Why?

Let's remember some conversion factors to work with kilograms (kg)

1kg=1000g=1x10^{3}g \\1kg=1,000,000mg=1x10^{6}mg \\1g=1000mg=1x10^{3}mg

So, we are given the momentum:

momentum=7.2x10^{-3} \frac{kg.m}{s}

We can rewrite the units of the momentum (equivalent) as follow:

momentum=7.2x10^{-3}kg \frac{m}{s}=7.2x10^{3} x10^{-3}g\frac{m}{s}=7.2\frac{g.m}{s}

and

momentum=7.2x10^{-3}kg \frac{m}{s}=7.2x10^{3} x10^{6}mg\frac{m}{s}=7.2x10^{3}\frac{mg.m}{s}

Note: There could be more equivalent units for the momentum, in example, we could work with equivalent units for meters (distance) and seconds (time).

Have a nice day!

8 0
3 years ago
Read 2 more answers
A certain superconducting magnet in the form of a solenoid of length 0.24 m can generate a magnetic field of 7.0 T in its core w
tatiyna

Answer:

N=14854.5turns

Explanation:

Given data

Length L=0.24 m

Magnetic field B=7.0 T

Current I=90 A

To find

Number of turns N

Solution

As we know that magnetic field is given as:

B=u_{o}I\frac{N}{L}

Rearrange the equation and solve for N

So

B=u_{o}I\frac{N}{L}\\\frac{B}{u_{o}I} =\frac{N}{L} \\N=\frac{LB}{u_{o}I}\\N=\frac{(0.24m)(7.0T)}{4\pi *10^{-7}*(90A)} \\N=14854.5turns

5 0
3 years ago
A tertiary source is the most desirable source for a researcher to use. True or false
Kaylis [27]

The statement ‘A tertiary source is the most desirable source for a researcher to use’ is false. It should be that your source is primary because it is more reliable and is related to the research you have been working on.

6 0
3 years ago
A car drives 16 miles south and then 12 miles west. What is the magnitude of the car’s displacement? 4 miles 16 miles 20 miles 2
Ostrovityanka [42]
For this case, what we can do is use the Pythagorean theorem to find the magnitude of the displacement of the car.
 We have then
 d ^ 2 = 16 ^ 2 + 12 ^ 2&#10;
 From here, we clear the value of d.
 We have then:
 d =  \sqrt{16 ^ 2 + 12 ^ 2} &#10;
 Rewriting:
 d = \sqrt{256 + 144}
 d = \sqrt{400}
 d = 20 miles&#10;
 Answer:
 
The magnitude of the car's displacement is:
 
d = 20 miles
7 0
3 years ago
Read 2 more answers
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