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WorksheetsMidterm Examination
Total questions: 42
Worksheet time: 1hrs 24mins
PART I
Instruction: Read the following statement below. Analyze whether the statement is correct or wrong. If the statement is correct choose True, if its not, choose False and write your correction in the space provided. Ready?
Yes
No
TRUE OR FALSE
1. Solid, liquid or gas are the three common phases of matter.
TRUE OR FALSE
2. Atoms in liquid are more close contact than gas’ atom.
TRUE OR FALSE
3. Force applied in small area will also have small pressure.
TRUE OR FALSE
4. Liquid is the only one can be considered as fluid.
TRUE OR FALSE
5. The unit for density is kg/m3
TRUE OR FALSE
6. 1 Pascal is equivalent to 1 N/m3
TRUE OR FALSE
7. The density of seawater is 1025 kg/m3.
TRUE OR FALSE
8. The density of Gold is 2.5 times the density of aluminum.
TRUE OR FALSE
9. Under water, the pressure exerted on a certain object decrease as depth increases.
TRUE OR FALSE
10. Pressure can be simply define as force per unit area.
PART II
Multiple Choice.
Ready?
Proceed
Nah
1. What is the principle that states “A change in pressure to an enclosed fluid is transmitted undiminished to all portion of the fluid and to the wall of its container.”
A. Archimedes’ Principle
B. Pascal’s Principle
C. Newton’s law of motion
D. None of the above
2. Pascal with the symbol Pa is the SI unit for pressure. What are the base units of Pa?
kg m/s2
kg m2/s2
kg/m s2
kg/s2
3. The following are applications of Pascal’s principle. Which among the following is not an application of the principle?
Hydraulic lift
Car brakes
Squeezing a toothpaste on its tube
Rising of water in a tube
4. What law is behind the concept of hydraulic systems?
Law of Conservation of Energy
Law of Inertia
Law of Mass and Acceleration
None of the above
5. When force is applied to a piston of small area, there would be…
Small pressure
Large pressure
Large force
Small force
6. What is the value of 100 millibar (mb) in Pascal (Pa)?
1x104 Pa
100 Pa
10 Pa
1 Pa
7. Which of the following equation is/are correct.
P1 = P2
F1 = F2
F1 < F2
F1 > F2
A1 < A2
8. Which of the following statement is/are correct?
The force applied on the second piston (in hydraulic system ) increases due to the first area.
The force applied on the first piston ( in hydraulic system) is greater than the second piston because of the pressure.
The force applied on the second piston ( in hydraulic system ) increases due to the second area.
he force applied on the second piston ( in hydraulic system ) decreases due to the second area.
In hydraulic system, area 1 and area 2 are equal.
9. Which of the following formula in Pascal’s Principle is/are correct.
10. In a hydraulic system, A2 makes the F2 ;
Lesser than F1
Equal to F1
Greater than F1
None of the above
11. What is the meaning of the word “Eureka!” when Archimedes discovered the principle of buoyancy
I’ve found it!
I bought it!
I lied about it!
I’ve lost it!
12. It is the upward force acting upon an object that is partially of wholly submerged in a fluid.
Specific Gravity
Buoyancy
Hydraulics
Capillarity
13. Identify which among the units is inversely proportional with buoyant force.
Density
Volume
Acceleration due to gravity
None of the above
14. If an object that has a density of 1.0045 is thrown in the sea, what do you think might happen?
The object will float
The object will sink
The object will rise to the sky
The object will dissolve in sea water
15. If an object’s density is twice than the density of the second object, how much is the buoyant force of the two objects?
The buoyant force of the second object is greater than the first object.
The buoyant force is equal.
The buoyant force of the first object is twice greater than the second one.
The buoyant force depends on the density of the water.
16. What makes an object’s weight lighter than its real weight when submerged in water?
It is due to gravity
It is due to the pressure present on the object
It is due to its mass
It is due to upward force applied on it
17. You and your nephew saw a plastic bottle floating on a river. Your nephew ask you why it floats, what will be your answer?
It floats because of its mass
It floats because of its weight
It floats because of its density
None of the above
18. If the buoyant force is greater than the object’s weight, the object will?
Sink
Rise to the surface and floats
Remain suspended at that depth
All of the above
19. If the buoyant force is equal to the object’s weight, the object will?
Sink
Float
Either sink or float
Remain suspended at that depth
20. What is/are true about buoyant force?
Buoyant force is the difference between the weight in air and apparent weight.
Buoyant force can be express FB = pVg
Buoyant force is inversely proportional to gravity
All of the above
21. _______ and ________ are two properties of liquid which shows how liquid’s molecules interact with each other and interact with other molecules present on different object.
Surface tension and capillary action
Cohesion and adhesion
Surface tension and cohesion
Capillary and adhesion
22. The______ force is an attractive force between molecules of same type
Cohesive
Adhesive
Buoyant
Gravity's
23. The______ force is an attractive force between molecules of same type
Cohesive
Adhesive
Buoyant
Gravity's
24. Cohesive forces between molecules cause the surface of a liquid to contract to the smallest possible surface area. This general effect is called________.
Surface area
Surface Tension
Capillary action
Cohesion
25. The molecules present on the surface of liquid is not attracted outward it is attracted only inward and _______.
Upward
Downward
Sideways
None of the above
26. Through___________ , insect can walk on water.
Capillary Action
Surface tension
Adhesion
Meniscus
27. A curve in the surface of a liquid substance when placed in a tube is called _________.
A. Meniscus
B. Concave
C. Convex
D. None of the above
Meniscus
Concave
Convex
None of the above
28. The height of liquid in a capillary tube is inversely proportional to the density, acceleration due to gravity and _______ of the capillary tube.
Radius
Width
Length
Property
29. Plant can be able to send water from its root up to its trunks and leaves through________.
Capillary action
Surface tension
Cohesion
Adhesion
30. When a liquid’s molecule is more attractive to a capillary tube’s molecule, its meniscus will be___________.
Curve
Convex
Round
Concave
