Q2 - Week 6 - 2018 Day 1- Monday Submit by 8 AM to https://goo gl/forms/PG6y0XoM
ID: 1576467 • Letter: Q
Question
Q2 - Week 6 - 2018 Day 1- Monday Submit by 8 AM to https://goo gl/forms/PG6y0XoMvTKD7EOc2 1. What is the volume and mass of a metal bar with a cross sectional area of 2 x 10-5 m2, a length of 2 meters and a density of 7500 kg/m3? 2. A window on the International Space Station is a rectangle that is 0.30 m x 0.50 m. The "air" pressure inside the Station is 1 atmosphere, and outside the pressure is zero. What is the net force on the window? 3. How far down in the ocean (P sea water 1027 kg/m3) would you have to go to find a pressure of 5 atmospheres? A man has a mass of 70 kg and a density of 1060 kg/m2 4. What is his volume? 5. If he is submerged in water, what is the buoyancy force on him? 6. What is the magnitude and direction of the force he must exert to remain at the same depth in the water?Explanation / Answer
1. Volume = area * length
= 2*10-5 * 2
= 4 * 10-5 m3
density = mass/volume
mass = density * volume
= 7500*4*10-5
= 0.3 kg
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