Pressure, Winds, Storms, and Cyclones — Flashcards
CBSE · Class 8 · Science
76 flashcards for Pressure, Winds, Storms, and Cyclones (CBSE Class 8 Science) to test yourself on key terms and facts.
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Why does a bag with broad straps feel more comfortable than a bag with narrow straps when both are equally heavy?
Answer
The same weight acts on a larger area with broad straps, so the pressure on the shoulders is smaller. Narrow straps act on a smaller area, so the pressure is higher and the bag hurts more.
चौड़ी पट्टियों वाला बैग, समान रूप से भारी होने पर भी, संकीर्ण पट्टियों वाले बैग की तुलना में अधिक आरामदायक क्यों लगता है?
Answer
वही भार चौड़े पट्टियों के साथ एक बड़े क्षेत्र पर कार्य करता है, इसलिए कंधों पर दबाव कम होता है। संकीर्ण पट्टियाँ एक छोटे क्षेत्र पर कार्य करती हैं, इसलिए दबाव अधिक होता है और बैग अधिक दर्द देता है।…
What is pressure?
Answer
Pressure is force per unit area. Only the force acting perpendicular to the surface is considered at this stage. Formula: Pressure = Force/Area.
दबाव क्या है?
Answer
दबाव, प्रति इकाई क्षेत्रफल बल होता है। इस स्तर पर केवल सतह पर लम्बवत लगने वाले बल पर विचार किया जाता है। सूत्र: Pressure = Force/Area.
A force of 100 N acts on a cardboard of area 2 m². What is the pressure?
Answer
Pressure = Force/Area = 100 N / 2 m² = 50 N/m². The pressure is 50 pascal, or 50 Pa.
100 N का बल 2m² क्षेत्रफल के एक गत्ते पर कार्य करता है। दबाव क्या है?
Answer
दबाव = बल/क्षेत्रफल = 100 N / 2 m² = 50 N/m². दबाव 50 पास्कल है, या 50 Pa.
Why is it easier to drive a nail using its pointed end?
Answer
The pointed end touches a smaller area, so the pressure becomes higher. Higher pressure makes it easier for the nail to enter the wood.
कील को उसके नुकीले सिरे से मारना आसान क्यों होता है?
Answer
नुकीला सिरा एक छोटे से क्षेत्र को छूता है, इसलिए दबाव अधिक हो जाता है। उच्च दबाव के कारण नाखून को लकड़ी में प्रवेश करना आसान हो जाता है।…
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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