When you blow some air above the upper face of a paper strip, the paper rises. T

Question

When you blow some air above the upper face of a paper strip, the paper rises. This occurs because the air above the upper face of the paper moves faster, which makes the pressure higher than at the lower face. the air above the upper face of the paper moves faster, which makes the pressure lower than at the lower face. the air above the upper face of the paper moves faster bat the pressure remains constant. the air above the upper face of the paper moves slower, which makes the pressure higher than at the lower face. the air above the upper face of the paper moves slower, which makes the pressure lower than at the lower face. A Piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water If the top piece if taken off and placed in the water, what happens to the water level in the tub? It goes up. It goes down. It does not change. This cannot be determined without knowing the volume of the top piece of wood. A cubical box, 5.00 cm on each side, is immersed in a fluid. The gauge pressure at the top surface of the box is 594 Pa and the gauge pressure on the bottom surface is 1133 Pa. What is the density of the fluid? 1000 kg/m3 1100 kg/m3 1220 kg/m3 2340 kg/m3 12.000 kg/m3 A 95 N force exerted at the end of a 0.50 m long torque wrench gives rise to a torque of What is the angle (assumed to be less than 90degree) between the wrench handle and the direction of the applied force? 22degree 14degree 18degree 25 When on object is floating, the buoyant force on it is just equal to its weight. True False

Explanation / Answer

(1)
The pressure at upper surface becomes lower compared to lower surface which causes paper strip to rise !!
Correct option - (b)

(2)
Correct option :- (c) It does not change !!
(3)
p*g*h = (1133 - 594)
p * 9.8 * 0.05 = (1133 - 594)
p = 1100 Kg/m^3

Correct option - (B)

(4) Incomplete question !!

(5)
If the buoyant force is greater than the object's weight, the object will rise to the surface and float. If the buoyant force is less than the object's weight, the object will sink. If the buoyant force equals the object's weight, the object will remain suspended at that depth

So, False !!

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