#1. In which of the following activities are Indian Remote Sensing (IRS)satellites used?  1. Assessment of crop productivity 2. Locating groundwater resources 3. Mineralexploration 4. Telecommunications 5. Traffic studies Select the correct answerusing the code given below.
#2. An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth 
#3. Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such as orbit when:  1. The orbit is geosynchronous. 2. The orbit is circular. 3. The orbit lies in the plane of the earth’s equator. 4. The orbitis at an altitude of 22,236. Select the correct answer using the codes given below