A body of mass 100 grams is tied to one end of a string and revolved along a circular path in the horizontal plane. The radius of the circle is 50 cm. If the body revolves with a constant angular speed of 20 rad/s, find the (1) period of revolution (2) linear speed (3) centripetal acceleration of the body.​

Answer:

Anode Ray Experiment:

An anode ray is a beam of positive ions that is created by certain types of gas-discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein, in 1886. Later work on anode rays by Wilhelm Wien and J. J. Thomson led to the development of mass spectrometry.

These rays were found to consist of positively charged particles and were called anode rays or positive rays or canal rays. These rays are believed to be produced as a result of the knock out of the electrons from the gaseous atoms by the bombardment of high speed electrons of the cathode rays on them.

Diagram is in attachment.

Importance of anode rays Experiment:

i) Anode rays travel in straight lines.

ii) Anode rays contain positively charged particles and hence cause mechanical motion.

iii) Anode rays are deflected both in electric (towards negative plate) and magnetic fields (towards South pole).

Apparatus:

Crooks tubes

He or O2 gas

Hopefully it will be helpful.

Sum of first n natural number is given by the formula

→ n(n+1) / 2

Here n = 20

So, Sum = 20(21) / 2

⇒ Sum = 210

• 210 is the sum of first 20 natural numbers.

• 20 natural numbers

• Sum of first 20 natural numbers

Given,

Sum of the first 20 natural numbers

• n = 20

We know that

• Sum of first natural = n(n + 1)/2

Where,

• n is natural numbers 20

↦ Sum of natural numbers = n(n + 1)/2

↦ 20(20 + 1) / 2

↦ 20(21)/2

↦ 420/2

↦ 210

Hence,

210 is the sum of first 20 natural numbers.

Explanation:

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प्रिय मित्र,

नमस्कार !

यहां का समाचार सकुशल है और आशा करता हूँ कि वहां भी सब सकुशल होंगे। मित्र कई महीने हो गए हमलोग मिले नहीं आपकी याद आ रही है। अतः आपसे मिलने आने के विषय में सोच रहा था। सर्दियों का मौसम शुरू हो गया है और मौसम विभाग की जानकारी के अनुसार ठण्ड और बढ़ेगी। अतः हमारे कॉलेज में शीतकालीन अवकाश की घोषणा कर दी गई है। हमारा महाविद्यालय शीतकालीन अवकाश के दौरान 10 दिनों तक बंद रहेगा। आशा है कि इन शीतकालीन अवकाश मे आपसे मिलने जा पाऊं। अपने स्वास्थ्य का ध्यान रखना और पत्र का उत्तर अवश्य देना।

आपका मित्र

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Answer:

Which one is an alkaline among the following?

(A) Vinegar

(B) Saliva

(C) Ammonia

(D) Acid rain

Ans. -

[tex]Ans⟹ (c) \: Ammonia[/tex]

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Answer:

C) Ammonia is the right answer.

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