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Marina CMI [18]
3 years ago
12

7)

Physics
1 answer:
REY [17]3 years ago
8 0
Hello,

The answer is A) a mixture. An element as defined as a pure substance, that cannot be broken down and most are typically naturally occurring. A compound occurs in chemical bonding. A substance is either a pure element or compound.
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Which of the following occurs when charging by rubbing? A. Electrons are created through friction. B. Protons combine with neutr
Lady_Fox [76]

The correct answer to the question is- C).Electrons are ripped off one material and held tightly by the other material.

EXPLANATION:

Before going to answer this question, first we have to understand the charging by friction.

There are three modes of charging a body, which are known as friction,conduction, and induction.

Friction: Friction is the type of charging a body due to the actual transfer of electrons when two substances of different electron affinities are rubbed with each other. During rubbing, the electrons from less electron affinity substance will be transferred to high affinity substance.

The substance which will accept electrons gets negatively charged, and the other substance will be positively charged.

There will be no transfer of protons from one substance to another as protons are bound inside the nuclei of atoms.

Hence, the correct answer to the question is that electrons are ripped off one material and held tightly by the other material.

5 0
3 years ago
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An undamped oscillator has period ro= 1.000 s, but I now add a little damping so that its period changes to r i= 1.001 s.
Firlakuza [10]

This Question has mistakes.Correct question is

An undamped oscillator has period  τo=1.000s , but I now add a little damping so that its period changes to  τ1=1.001s.

What is the damping factor β? By what factor will the amplitude of oscillation decrease after 10 cycles? Which effect of damping would be more noticeable, the change of period or the decrease of the amplitude?

Answer:

β=0.28 /sec

Amplitude=0.0606

Explanation:

T_{o}=2\pi  /w\\T_{1}=2\pi /\sqrt{w^{2} -\beta^{2}  }\\ As\\T_{o}=1 \\T_{1}=1.001\\From  T_{o}\\w=2\pi \\So\\T_{1}=w/\sqrt{w^{2} -\beta^{2}  }\\\beta =0.00447w\\\beta =0.00447(2\pi )\\\beta =0.28sec^{-1}\\ Amplitude=Ae^{-\beta t}\\ after\\ t=10T_{1}\\so\\Ae^{-\beta(10t_{1}) }=e^{-\beta(10t_{1}) }\\=e^{-\(0.28)(10)(1.001) }\\Amplitude=0.0606

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4 years ago
A mass spectrograph is used to measure the masses of ions. true or false
zysi [14]

Answer:

It is true.  

Mass spectrometry (MS) is an analytical technique that measures the mass-to-charge ratio of ions. The results are typically presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.  

A mass spectrum is a plot of the ion signal as a function of the mass-to-charge ratio. These spectra are used to determine the elemental or isotopic signature of a sample, the masses of particles and of molecules, and to elucidate the chemical identity or structure of molecules and other chemical compounds.

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