Class 12 नया सत्र (2024-25)? | किरण प्रकाशिकी एवं प्रकाशिक यंत्र - L6 | लेंस - Lens in Hindi

Class 12 Physics (Hindi) | Chapter 4 गतिमान आवेश एवं चुम्बकत्व | Important Questions and Quick Revision

Class 12 New Session 2024-25? आरंभ बोर्ड 2025 का✅ 11th से 12th में जाने वाले बच्चों के लिए VVI Video

In a group of 25 students, 13 can speak English, 12 can speak Hindi and 6 speak neither. How many can speak (i) Both English and Hindi ? (ii) Only Hindi ? (iii) Exactly one of the two languages ?

Figure shows ( in cross section ) a wall consisting of four layers, with thermal conductivities k_(1) = 0.060W//m.K, k_(3)= 0.040W//m.K , and k_(4) = 0.12W//m.K(k_(2) is not known). The layer thickness are L_(1) = 1.2 cm, L_(3) = 5.6 cm , and L_(4) = 4.0 cm ( L_(2) is not known ) . The known temperatures are T_(1) = 30^(@)C, T_(12) = 25^(@)C , and T_(4) = - 10^(@) C . Energy transfer through the wall is steady. What is interface temperature T_(34) ?

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12 Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?