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1. In general, the higher the frequency of the interfering waves,
A. the higher the wavelength C. the greater the number of nodes and antinodes B. the higher the speed of the waves D. the higher the amplitude of the waves
2. Which of the following materials should be use to make an ear protector against loud sound?
A. a material that produces sound C. a material that absorbs sound
B. a material that transmits sound D. a material that amplifies sound
1. Birds can fly because air pressure is
A. greater above than below their wings.
B. the same on both sides of their wings.
C. greater below than above their wings.
D. transmitted through their wings.
2. Three containers are used in a chemistry lab. All containers have the same bottom area and the same height. A chemistry student fills each of the containers with the same liquid to the maximum volume. Which of the following is true about the pressure on the bottom in each container?
A. P1 > P2 > P3
B. P1 <P2 <P3
C. P1 <P2 >P3
D. P1 >P2 <P3
E. P1 =P2 =P3
- To increase pressure
A. Area of contact is increased C. Magnitude of thrust is decreased B. Area of contact is decreased D. None of these
2.What is the volume occupied by a kilogram of gold? (Recall that ρgold =2×104kg/m−3.)
A. 5×10−3 m3 C. 5×10−5 m3
B. 2×104 m3 D. 5×10−4 m3
3. The pressure of ocean water increases as the water
A. gets closer to shore C. gets shallower
B. becomes deeper D. two of the above
- Which statement is true?
A. For an ideal fluid flow, the greater the speed, the greater the pressure.
B. Atmospheric pressure decreases exponentially with increasing altitude.
C. Hydrostatic pressure exerted on a submerged object decreases with the depth of the object.
D. The pressure exerted at one point on a confined fluid at rest will decrease as it is transmitted to other parts of the fluid.
2.The difference between absolute pressure and atmospheric pressure is called
A. Air pressure C. gauge pressure
B. Barometric pressure D. hydrostatic Pressure
3. With the increase in the weight of an object the pressure
A. Increases C. remains the same
B. Decreases D. none of these
1. The density of a substance is 2500 kg/m3. What volume will 250 kg of this substance occupy?
A. 0.001 m3 C. 0.10 m3
B. 0.01 m3 D. 1.0 m3
2. In a typical hydraulic press, a force of 20 N is exerted on the small piston of area 0.050 m². The force exerted by the large piston on the load if it has an area of 0.50 m² will be
A. 200 N C. 50 N
B. 100 N D. 10 N
Consider the following situation׃ the force exerted on the small piston of a hydraulic lift is 160 N. The areas of the small piston and the large piston are 0.5 m2 and 1.0 m2, respectively.
1. What is the pressure exerted on the large piston?
A. 80 Pa C. 320 Pa
B. 160 Pa D. 640 Pa
2. What is the output force on the large piston?
A. 80 N C. 320 N
B. 160 N D. 640 N
3. Which term in Bernoulli’s theorem is referred to as the pressure head?
A. mgh C. v2/2g
B. P𝑚/𝜌 D. P/pg
obtain the equation of motion for Foucault pendulum
You can’t see clearly underwater with the naked eye, but you can if you wear a face mask or goggles (with air between your eyes and the mask or goggles). Why is there a difference? Could you instead wear eyeglasses (with water between your eyes and the eyeglasses) in order to see underwater? If so, should the lenses be converging or diverging? Explain.
If a piece of photographic film is placed at the location of a real image, the film will record
the image. Can this be done with a virtual image? How might one record a virtual image?
A spherical air bubble in water can function as a lens. Is it a converging or diverging lens?
How is its focal length related to its radius?
