Physics question and answers for March 25, 2024
- Q Water flows through a pipe with decreasing cross-sectional area. Which one of the following statements is true?The speed of the water remains constant, while its pressure increasesThe speed of the...
- Q A water balloon is half filled with water and then sealed off. If you squeeze on the part of the balloon holding air at the top, you can get the...
- Q A very deep alpine lake has a depth of about 350 m. a) How does the pressure at the bottom of the lake compare to the pressure at the top?...
- Q A metal block is suspended from a spring scale and weighs 5.4 N. The block is lowered into water until completely submerged. The spring scale now reads 3.4 N. What...
- Q Air flows horizontally over the opening of a straw placed in a beaker of water. a) Sketch the situation. b) If the speed of the air is increased, what happens...
- Q A sealed syringe is half filled with air. If you pull the plunger out what will happen to the pressure inside the syringe? Explain. b) If the syringe is pulled...
- Q A sealed syringe of gas initially has a volume of 20 cm. You press on the syringe until its volume is cut in half. a) What change was there in...
- Q A piece of Styrofoam is floating in water. A piece of metal is placed on top of the Styrofoam. a) Does the depth of the Styrofoam in the water change?...
- Q A device for making sensitive pressure measurements is called a manometer. A manometer is a U-shaped tube filled with a liquid as shown. a) If the pressure at point A...
- Q A completely submerged 0.41-kg ball is attached by a cable of negligible mass to the bottom of a tank of gasoline, as shown. The volume of the ball is 0.0075...
- Q A frequently quoted rule of thumb in aircraft design is that wings should produce about 1000 N of lift per square meter of wing. (The fact that a wing has...
- Q 1) A 10,000 N car is on a circular hydraulic press plate with radius 2 meters. A smaller plater with radius 0.4 meters is used for lifting the car. What...
- Q Water is hard to compress as its bulk modulus is 2.0 x 10 pascals. If a volume of water is subjected to a pressureincrease of 150 pascals and its initial...
- Q Jason takes off across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible). The skis...
- Q Given a sphere of diameter 0.001 m and velocity = 30 m/s show whether quadratic or linear terms dominate the drag force present.For (A) find the velocity at t =...
- Q A cannon tilted upward at ? = 25 fires a cannonball with a speed of 94 m/s.Part AAt that instant, what is the component of the cannonball's velocity parallel to...
- Q A piston of surface area 1200 mm moves inside a cylinder with a velocity of 6 m/s. The piston has a diameter of 50 mm and the cylinder has a...
- Q The radius of a soap bubble is r. The surface tension solution T. Keeping soap temperature constant, the radius of the soap bubble is doubled, the energy necessary for this...
- Q Two cylindrical vessels of equal cross sectional area A, contain liquid of density p, upto the heights h? and h2. After inter connection the levels become equal then work done...
- Q A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250m. Assuming that the pressure inside the house is atmospheric...
- Q Two cylindrical vessel of equal cross-sectional area. A contain water upto height h? and h?. The vessels are interconnected so that the levels in them become equal. The work done...
- Q A glass plate of length 0.1m. breadth 15 x 10-m and thickness 2 10- m weights 8 10- kg in air. It is heid vertically with its longer side horizontal...
- Q A 3-m long water pipe with the cross-sectional area 20 cm2 inclined at 30 degrees to the wall is connected to a system under the pressure P1 at the top...
- Q A boat, that has a density of 0.66 g/cm, is 3m long, 1.5m wide, and 50cm high. When the boat is floating in water, how high is the dry surface...
- Q A room measures 3.0 m by 4.5 m by 6.0 m. If the heating and air-conditioning ducts (one in and one out) to and from the room are circular with...
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