Solved Paper Supervisor 2017 (HPSSC Hamirpur)
1. The temperature of Solar surface called “Photosphere is about – 6000 k 2. Why does the water in an earthen pot cool in summer?- It is due to phenomenon of evaporation 3. The audible range of human ear is – 20 to 20,000 hz 4. An ultrasonic scanner is a device used to – locate tumours in a… Read More »