If a cannonball were launched horizontally (launch angle of 0) with a speed of 37m/s from a height of 15m, how long would the cannonball remain in the air?

The low lands i believe

The speed was not exceeded so it was slow

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.