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posledela
4 years ago
14

According to this electric charge cannot be created or destoryed

Physics
1 answer:
nordsb [41]4 years ago
3 0
False, charges can be created or destroyed. Only mass and energy cannot be created nor destroyed. 
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When an excited electron in a hydrogen atom falls from the n = 3 to the n = 2 level, a photon of red light is emitted from the a
Kaylis [27]

Answer: 653.33 nm ; 1875, 24 nm

Explanation: For the first case we have to use the Balmer series for  the hydrogen  when the atom falls from the n = 3 to the n = 2. So for the second transtions for the hydrogen we use  the Paschen serie.   To do  the calculation we need to know  the Ryberg constant that is equal to 1.097 * 10^7 m^-1. In the attach is shown the expression for spectral series used for calculation.

3 0
3 years ago
What is measurement​
HACTEHA [7]

Answer:

“Measurement” is the act of determining a target's size, length, weight, capacity, or other aspect. There are a number of terms similar to “measure” but which vary according to the purpose (such as “weight,” “calculate,” and “quantify.”) In general, measurement can be understood as one action within the term “instrumentation.”  

Explanation:

• To show measured results using values and symbols. • To use measurement tools.   Measuring a target can be done through either direct measurement or indirect measurement. An Indirect measurement is done, for example, by using a dial gauge to measure the height difference between a measurement target and a gauge block and using that height to indirectly determine the target's height. Because this type of measurement is based on a reference, indirect measurement is also referred to as “comparative measurement.

An ”Direct measurement is measurement done by bringing the target into contact with the measurement system to read the length, height, or other aspect directly. Although direct measurement allows measurement results to be known as they are, errors may occur depending on the skill of the person doing the measurement.

5 0
3 years ago
1. Calculate the mechanical advantage of a machine that has an input force of 13 N and
Helga [31]

Answer:

52 N output

Explanation: 65-13=52

6 0
3 years ago
Read 2 more answers
Sound travels faster in: steel water sir
alukav5142 [94]
Sound travels better in water
8 0
4 years ago
An audio amplifier provides an alternating rms emf of 15.0V a loudspeaker connected to the amplifier has a resistance of 10.4 w
Margarita [4]

Answer:

Current in the speaker will be 1.442 A

Explanation:

We have given an audio amplifier of rms emf of 15 volt

So emf of the audio amplifier V=15volt

Resistance of the amplifier R=10.4ohm

We have to find the current

From ohm's ;aw we know that V = IR , here I is current and R is resistance

So 15=I\times 10.4

I = 1.442 A

So current in the speaker will be 1.442 A

4 0
3 years ago
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