Fisica

DENSITY
1. What is the approximate mass of air in a living room 4.8 m x 3.8 m x 2.8 m?
2. What is the volume of 300 g of mercury?
3. An unknown substance has a volume of 20 ft3 and amass of 3370 lb. What is its density?
4. What is the mass of a solid wrecking iron ball of radius 18 cm?
5. If you tried to smuggle goldbricks by filling your backpack, whose dimensions are 60cmx 28cm x 18cm, what would its mass be?
6. How thick is a gold sheet whose area is 3.12cm2 and weighs 6.5 mg?
7. A bottle has a mass of 35g when empty and 98.44g when filled with water. Whenfilled with another fluid, the mass is 88.78g. What is the specific gravity of this other fluid?
8. A calibrated lab flask of 200 mL is filled with an unknown liquid. An electronic scale shows thatthe unknown liquid has a mass of 176 g. What is the specific gravity of the liquid? Can you tell which liquid is it?
9. One kind of wood’s specific density (relative density) is 0.3 Find thewood’s density in kg/m3 and the mass of 30 cm3 of that kind of wood. What kind of wood do you think it is according to its density?

SPECIFIC WEIGHT
1. A 0.5 kg mass of alcohol occupies a volume of0.000633 m3. Calculate (a) the density and (b) the specific weight.
2. Calculate the mass and the weight of 15,000 L of gasoline.
3. What is the volume in cubic meters and in liters of 3,000 N ofolive oil whose specific weight is 9016 N/m2?

PRESSURE
1. What is the pressure due to a 120 N force on a surface whose area is 0.040 m2?
2. What is the difference in blood pressure (mm-Hg)between the top of the head and bottom of the feet of a 1.60 m tall person standing vertically?
3. The maximum gauge pressure in a hydraulic lift is 17.0 atm. What is the largest size vehicle (inkg) it can lift if the diameter of the output line is 28.0 cm?
4. A golf shoe has 10 spikes, each one with an area of 0.01 in2 when in touch with the floor. All the spikes support the...