1) In a 55 s interval, 392 hailstones strike a glass window of area 0.888 m2 at an angle 40◦ to the window surface. Each hailstone has a mass of 7 g and speed of 6.9 m/s. If the collisions are elastic, find the average force on the window. Answer in units of N.Find the pressure on the window. Answer in units of N/m 2 .
2)Find the density of seawater at a depth where the pressure is 3200 atm if the density at the surface is 1040 kg/m3 . Seawater has a bulk modulus of 2.3 × 109 N/m 2 . Answer in units of kg/m3 .