10. A tube is attached to the left-hand side of a connector. Two tubes, situated
ID: 1639402 • Letter: 1
Question
10. A tube is attached to the left-hand side of a connector. Two tubes, situated one on top of the other, are connected to the right-hand side. Water enters the system from the left tube, flows at a constant velocity through the connector, and exits via the two right-hand tubes. At which opening is the velocity of water the greatest?
Note: Due to the size of the system, there is no need to refer to gravity in the analysis of the question.
12. The grey cogwheel labelled 1 is being turned at a constant speed in a counter clockwise direction as shown in the diagram. The red cogwheel has 16 teeth whilst the rest of the cogwheels have 12 teeth.
Please choose the sentence which correctly describes the rotation of the red cogwheel in comparison to cogwheel 1.
The diagram shows two fixed cogwheels which can only rotate around their own axis. A rack is inserted between the two cogwheels and is moved in the direction shown by the arrow.
13. What are the directions of movement and velocities of revolution of the cogwheels?
14. The molecular composition of carbon dioxide is
15. An atom that has gained or lost electrons is known as a/an
10. A tube is attached to the left-hand side of a connector. Two tubes, situated one on top of the other, are connected to the right-hand side. Water enters the system from the left tube, flows at a constant velocity through the connector, and exits via the two right-hand tubes. At which opening is the velocity of water the greatest?
Note: Due to the size of the system, there is no need to refer to gravity in the analysis of the question.
11. Two identical triangles are placed inside a water tank as shown in the diagram below. The triangles are fixed in position. On which triangle will a greater force be exerted?
12. The grey cogwheel labelled 1 is being turned at a constant speed in a counter clockwise direction as shown in the diagram. The red cogwheel has 16 teeth whilst the rest of the cogwheels have 12 teeth.
Please choose the sentence which correctly describes the rotation of the red cogwheel in comparison to cogwheel 1.
The diagram shows two fixed cogwheels which can only rotate around their own axis. A rack is inserted between the two cogwheels and is moved in the direction shown by the arrow.
13. What are the directions of movement and velocities of revolution of the cogwheels?
14. The molecular composition of carbon dioxide is
15. An atom that has gained or lost electrons is known as a/an
N2 -7 AV2 2 3 AExplanation / Answer
(10) We know the water will enter through pipe 1 and exit from the pipe 2 and 3 .
We know that the discharge will remain constant .
Therfore
Q1 = Q2 + Q3
Where Q1 is the discharge which is entering through the pipe 1.
Subscript 2 and 3 representing the discharge through pipe 2 and 3
We know that discharge = Area*Velocity
Hence
AV1 = (A/2)V2 + (A/2)V3
Since the area of the pipe 2 and 3 is same therfore there velocity would be same
V2 = V3 = V
AV1 = (A/2)V
V = 2V1
Hence the velocity of water through pipe 2 and 3 will be the largest.
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