Study Point

Yes, when two different non-metallic materials are rubbed together, they can become charged due to the transfer of electrons: Charging by friction When two insulating materials are rubbed together, electrons are transferred from one material to the other. This process is called charging by friction. Charged objects The material that loses electrons becomes positively charged, while the material that gains electrons becomes negatively charged. For example, when a glass rod is rubbed with silk, the glass rod becomes positively charged and the silk becomes negatively charged. Charged objects interacting Charged objects can interact with each other. For example, if a charged balloon is touched to a neutral balloon, some of the electrons from the charged balloon are transferred to the neutral balloon. Both balloons will then have a negative charge and will repel each other.

What are Newton's 1st, 2nd, and 3rd laws of motion? In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

जैसा कि सर्वविदित है, ब्यूटिरिक एसिड ही उल्टी को वह विशिष्ट, एक मील दूर से सूंघने वाली गंध देता है। और यही कारण है कि हम इसे पहचानने में इतने अच्छे हैं। मनुष्य इसे 10 भाग प्रति मिलियन तक पहचान सकता है।

तारे टिमटिमाते हैं, क्योंकि पृथ्वी के वायुमंडल में मौजूद हवा की परतों के घनत्व में लगातार बदलाव होता रहता है. इस वजह से तारों से आने वाली प्रकाश किरणें इन परतों से अपवर्तित होती रहती हैं. कभी ये किरणें कम विचलित होती हैं, तो कभी ज़्यादा. इससे आंखों में प्रकाश कभी कम और कभी ज़्यादा पहुंचता है, जिससे तारे टिमटिमाते दिखाई देते हैं