1.The pressure exerted by a force on an area is greater when the areais:
reduced
increased
expanded
None of the above
2. When a fluid is in equilibrium, the vector sum of thevector forces of the vertical forces on the fluid element mustbe:
A scalar
different from zero
equal to zero
None of the above
3. When a body is submerged in a fluid the sum of forces givesus the force as an equivalence:
normal
tangential
buoyant
None of the above
4. The water runs towards a source filling all the tubes at aconstant rate of 0.750 m ^ 3 / s, the speed with which it will comeout of a 4.50 cm diameter hole is:
3.58m / s
4.72m / s
5.73m / s
None of the above
5. A barrel contains an oil layer of 0.120 over 0.250 ofwater. The density of the oil is 600 kg / m ^ 3. The gauge pressureat the oil-water interface is:
760Pa
50Pa
200Pa
None of the above
6. The water flows upwards from a hose in a patio leaving thenozzle at a speed of 15m / s. Using Bernoulli's equation, theheight that the water reaches is:
8.50m
10.0m
11.5m
None of the above
7. The hydraulic jack of a car illustrates:
Hooke's Law
Newton's third law
Pascal's principle
None of the above
8. One hydraulic press has a 2.0cm diameter piston and anotherpiston has a 8.0cm diameter. What force must be applied to thesmallest piston to balance a 1600N force to the largestpiston?
6.25N
25N
400N
None of the above
9. A spruce wood board floats in fresh water with 60% of itsvolume underwater. Its density in g / cm ^ 3 is:
0.6
0.5
0.4
None of the above
10. Bernoulli's equation is a derivation of the ConservationLaw from:
mass
Energy
linear momentum
None of the above
