class 9th science – Tiwari Academy Discussion

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Anonymous

Asked: February 14, 2020In: Class 9

यदि पृथ्वी की त्रिज्या R=6.37×10 (6)मी गुरुत्वीय त्वरण g=9.8m/sec तथा गुरुत्वीय नियतांक G=6.67×10 (-11) N×m/kg है तो ज्ञात कीजिये (1) पृथ्वी का द्रव्यमान (2) पृथ्वी का मध्य घनत्व ।

Class 9th lesson 10

Arun yadav

Asked: January 6, 2020In: Class 9

5 kg ki a vashtu 10m/sec ke beg se gatiman hi ese rokne ke liye 20N ka bal lagaya jata hi kar rukne me kitna smay lagega

class 9th questions physics lesson 9