Hello please answer each question by step - step and provide the solutions to. Lesson 11

1. A certain liquid has a volume of 55 mL and mass of 33 g. The density of this liquid is closest to

a. 1.7 g/mL

b. 1 8 x 10^3 g/ml

c. 1.9 g/mL

d. 0.60 g/mL

2. The ability of the particles of a substance to be pressed closer together is called

a. viscosity

b. fluidity

c. density

d. compressibility

3. An appropriate SI unit for density is

a. kg/m^2

b. g/cm^3

c. m^3/kg

d. none of the above

4. A certain water-cutting operation requires a flow rate of 4.8 L/min. If a certain cut takes 22 s to perform, then the volume of water used is closest to

a. 1.6 L

b. 1.7 L

c. 1.8 L

d. 19 L

5. The density of glycerin is 1260 g/L. The mass of 140 L of glycerin is closest to

a. 9.0 kg

b. 180 000 kg

c. 180 kg

d.0.11 kg

6.The state of matter having particles with the least force of attraction is

a. fluid

c. liquid

d. gas

b. solid

7. Ethyl alcohol has a density of 0.789 g/cm?. A graduated cylinder 25 cm tall and 5.2 cm in

diameter will hold a mass of alcohol of

a. 130 g

b. 530 g

C. 350 g

d. 420 g

8. A 3300 kg circus elephant standing on an area of 0.50 m? creates a pressure of

a. 6.6 kPa

b. 65 kPa

C. 16 kPa

d. 160 kPa

9. A pneumatic cylinder has air of pressure 280 kPa acting on an a cylinder head of area 3.5 x 10-3 m?. The force on the cylinder head is

a. 8.0 107 N

b. 6.7* 107N

C. 890 N

d. 980 N

10. A bicycle pump must create a pressure of 140 kPa using the body weight created by a 65-kg person. The area of the pump cylinder needs to be closest to

a. 4.6 10-3 m2

b. 4.6 10-1 m2

C. 6.5 10-3 m2

d. 6.5 10-1 m?

11. Which of the following is not an advantage of the hydroforming process?

a. equipment is inexpensive

b. complex shapes are created in fewer operations

C. parts may have less weight

d. components have increased strength and stiffness

12. Which of the following is not an advantage of water-jet cutting?

a. does not stress material being cut

b. easily controlled by robot

C. quiet operation

d. does not deform the material being cut

13. If 45 L of water is used in 3.0 min, the volume flow rate is

a. 135 L/min

b. 15 L/min

C. 45 L/min

d. 48 L/min

14. A volume flow rate of 12 L/min will expel 1.0 L of water in a time of

a. 12 S

b. 1.0 s

C. 4.0 s

D.5.0 s

15. The formula p = Dgh cannot be used to determine air pressure because

17. An empty 1.5-L container has a mass of 270 g. When filled with a certain liquid, the

total mass is 1460 g. What is the density of the liquid?

18. An upright soup can has a weight of 3.5 N and has a base area of 0.0085 m^3. What is the

pressure created by the can on a table on which it rests?

19. Determine the mass of a block of brass measuring 0.25 m by 0.20 m by 0.15 m. The density of brass is 8500 kg/m^3

20. A cottage owner wishes to pump water from a lake to her cottage, which is up a hill. If the pump creates a gauge pressure of 61 kPa, what is the maximum height to which water could be pumped? (Assume

that the density of water is 1.0 x 103 kg/m^3).

21. A certain pneumatic system creates a pressure of 525 kPa. What is the cross-sectional area in m^3

of an actuator if a 1500 N force needs to be created?

22. How much time does it take, in seconds, to fill a 1.75 L cylinder if the volume flow rate is 35

L/min?