Salma takes 15 minutes from her house to reach her school on a bicycle. if the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.

Because its reliable.   there is no pollution  the chances of a radiation leak is low

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.