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GENERAL PHYSICS 2 (First Summative Test)

Quiz by Mark Paulo San Juan

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30 questions
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  • Q1

    Which of the following is the best statement of Pascal’s Law?

    two electrons cannot occupy the same quantum state at the same time

    pressure on a confined liquid is transmitted equally in all directions

    a numerical arrangement where each number is the sum of the two numbers above

    the volume of a gas is directly related to its temperature

    60s
  • Q2

    An ideal fluid flows through a long horizontal circular pipe. In one region of the pipe it has radius R. The pipe then widens to radius 2R.What is the ratio of the fluids speed in the region of radius R to the speed of the fluid in region with radius 2R?

    1/2

    1

    4

    1/4

    60s
  • Q3

    A fluid is forced through a pipe of changing cross section as shown. In which section would the pressure of the fluid be minimum?

    Question Image

    IV

    II

    I

    III

    60s
  • Q4

    A hydraulic press allows large masses to be lifted with small forces as a result of which principle?

    Pascal's

    Bernoulli's

    Newton's

    Archimedes'

    60s
  • Q5

    A 500N weight is on the small piston of a hydraulic machine. The small piston has an area of 2cm2. If the large piston has an area of 40cm2,how much weight can the large piston support?

    25 N

    500 N

    10,000 N

    40,000 N

    300s
  • Q6

    As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it?

    it decreases

    it increases

    it remains constant

    it may increase or decrease, depending on the shape of the rock

    60s
  • Q7

    50cm3 of wood is floating on water and 50 cm3 of iron is totally submerged. Which has the greater buoyant force on it?

    the wood

    both have the same buoyant force

    the iron

    cannot be determined without knowing their densities

    60s
  • Q8

    Saltwater is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the amount of water displaced in the salt water is

    more

    the same

    cannot be determined from the given information

    less

    60s
  • Q9

    Determine the mass of the air contained in a room whose dimensions are15 ft x 20 ft x 20 ft. Assume the density of the air is 0.0724 lb/ft3.

    434.4 lbs

    544.4 lbs

    534.4 lbs

    444.4 lbs

    300s
  • Q10

    The water flows in the channel 200 mm x 300 mm at the rate of 2 m/sec. What is the volume flow in ft3/sec?

    4.24

    1.24

    2.24

    3.24

    300s
  • Q11

    Two gaseous streams are mixed with one stream contains a diameter of 120 mm and specific gravity of 0.86 and speed of 5m/s and on the other stream is 150 mm and density of 890 kg/m3 at 2m/s. Find the mass flow rate at the exit if diameter of exit is 200 mm.

    80 kg/s

    65 kg/s

    70 kg/s

    75 kg/s

    300s
  • Q12

    Water flows in a pipe at the rate of 10 kg/s. If speed of flow is 10 m/s, find the pipe diameter.

    38.39 mm

    42.39 mm

    30.23 mm

    35.68 mm

    300s
  • Q13

    Oil flow through 16 tubes on a single tubes on a single cooler with a velocity of2m/s. The internal diameter of the tube is 30 mm and oil density is 0.85 g/ml. Find the volume flow in liters per sec.

    62.22

    32.22

    42.62

    22.62

    300s
  • Q14

    Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the water pressure greater?

    the same point A and point B

    cannot be determined from the given information

    point A

    point B

    60s
  • Q15

    A copper block is connected to a string and submerged in a container of water.

    Position1: The copper is completely submerged, but just under the surface of the water.

    Position2: The copper is completely submerged, mid-way between the water surface and the bottom of the container.

    Position3: The copper is completely submerged, but just above the bottom surface of the container.

    Assume that the water is incompressible. What is the ranking of the buoyant forces (B) acting on the copper blocks for these positions, from least to greater?

    B1 < B2 < B3

    B3 < B2 < B1

    B1 = B2 = B3

    B3 < B1 = B2

    120s

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