Advertisements
Advertisements
Question
The pressure in a liquid at two points in the same horizontal plane are equal. Consider an elevator accelerating upward and a car accelerating on a horizontal road. The above statement is correct in
Options
the car only
the elevator only
both of them
neither of them
Advertisements
Solution
the elevator only
The two points in the same horizontal line will not have equal pressure if the liquid is accelerated horizontally. There should be vertical acceleration.
APPEARS IN
RELATED QUESTIONS
Explain why Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though the height of the atmosphere is more than 100 km
A large He balloon of volume 1425 m3 is used to lift a payload of 400 kg. Assume that the balloon maintains constant radius as it rises. How high does it rise? [Take y0= 8000 m and `rho_"He"`= 0.18 kg m–3].
1 kgf = .............. (nearly).
Pressure is reduced if .................... increases.
State the unit of thrust
It is easier to cut with a sharp knife than with a blunt one. Explain.
How much thrust will be required to exert a pressure of 20,000 Pa on an area of 1 cm2.
A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will
Consider the situation of the previous problem. Let the water push the left wall by a force F1 and the right wall by a force F2.
Water flows through a horizontal tube of variable cross section. The area of cross section at A and B are 4 mm2 and 2 mm2 respectively. If 1 cc of water enters per second through A, find (a) the speed of water at A, (b) the speed of water at B and (c) the pressure difference PA − PB.
In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm2. If a force of 25 N is applied to the input piston, calculate weight/force on output piston.
An empty plastic bottle closed with an airtight stopper is pushed down into a bucket filled with water. As the bottle is pushed down, there is an increasing force on the bottom. This is because
It is difficult to cut cloth using a pair of scissors with blunt blades. Explain.
If the same force is made to act on a larger area, the pressure ______.
Cooking in a place located at a higher altitude is difficult. Why?
Scuba divers wear special suits to withstand ______.
All flowing substances, both liquids, and gases are called ______.
Assertion (A): Air gets thinner with increasing altitude.
Reason (R): The atmospheric pressure increases as we go up in mountains.
Assertion (A): A sleeping mattress is so designed that when you lie on it, a large area of your body comes in its contact.
Reason (R): This reduces the pressure on the body and sleeping becomes comfortable.
