A 79-kg swami lies on a bed of nails with his body supported by 2,000 nails. The area of the point of each nail is 1 mm^2. If the threshold pressure for pain is 1 mpa, how unpleasant is the experience for the swami? What if the point area is 0.1mm^2?

Problem 3: A person walks around in high-heeled shoes. Their weight is momentarily placed on one heel which has an area of 1.5 cm². If their mass is 60 kg, what is the pressure exerted by their heel on the floor in pascals?

A tall, open container is full of glycerine. At what depth ℎ below the surface of the glycerine is the pressure 2390 Pa greater than atmospheric pressure? The density of glycerine is 1.26×103 kg/m3.

Item 12 The small capillaries in the lungs are in close contact with the alveoli. A red blood cell takes up oxygen during the 0 75 s that it squeezes through a capillary at the surface of an alveolus.

Humans evolved in Earth's atmosphere, therefore the pressures interior to the body are relatively close to atmospheric pressure. Because the differences between internal body pressures and atmospheric pressure are so small, individuals have a difficult time gauging the magnitude of atmospheric pressure. Suppose an individual is lying on his stomach with sheets of paper stacked on his back. If each sheet of paper has a mass of 0.00360 kg and is the standard letter size of 8.5 in by 11 in (0.216 m by 0.279 m), how many sheets must be stacked to produce a pressure on his back equal to atmospheric pressure (roughly 101325 Pa)? sheets of paper required:

A tall, open container is full of glycerine. At what depth h below the surface of the glycerine is the pressure 2290 Pa greater than atmospheric pressure? The density of glycerine is 1.26x103 kg/m3.

A tall, open container is full of glycerine. At what depth h below the surface of the glycerine is the pressure 2210 Pa greater than atmospheric pressure? The density of glycerine is 1.26 × 10° kg/m³. h =

A steel bar two inches in diameter and 20 feet long resists a tensile load of 50,000 pounds. What is the unit tensile stress in the bar? Hint: Stress-force/area 7,958 psi 12,500 psi 15,915 psi 25,000 psi

For the next two items: A playroom has dimensions 3700 mm x 4300 mm x 2500 mm. How much does the air weigh in the room if the air pressure is 1.0 atm? O 402 N 472 N O 390 N 48 N

9-90. The starter for an electric motor is a full cylinder and has the cross-sectional areas shown. If copper wiring has a density of Peu = 8.90 Mg/m³ and the steel frame has a density of Pst = 7.80 Mg/m³, estimate the total mass of the starter. Neglect the size of the copper wire. Problem 9-90 Steel Copper 80 mm 50 mm 30 mm 100 mm 60 mm