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Priyansh
Subject: Physics
, asked on 24/3/18
Q12 please answer fast:
12. A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plae of mass M stationary at a height h=15m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is (Assume the collusion to be inelastic).
(A) 1 kg (B) 1.414 kg
(C) 2 kg (D) 10 kg
Answer
1
Tanishka Gupta
Subject: Physics
, asked on 23/3/18
Solve que 12.15 and 12.16
Q.12.15. At one point in a pipeline, the water's speed is 3.2 m/s and the gauge pressure is 5.00 × 10
4
Pa. Find the gauge pressure at a second point in the line, 1.0 m lower than the first, if the pipe diameter at the second point is twice that at the first.
Q12.16- At a certain point in a horizontal pipeline, the water's speed is 3m/s and the gauge pressure is 1.80 × 10
4
Pa. Find the gauge pressure at a second point in the line if the cross- sectional area at the second point is twice that at the first.
Answer
1
Tanishka Gupta
Subject: Physics
, asked on 23/3/18
Solve que 12.10.
A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.2N. When the rock is totally immersed in water, the tension in 28.4 N. When the rock is totally immersed in an unknown liquid, the tension is 17.6N. What is the density of the unknown liquid?
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Solve this:
Glycerine flows steadily through a horizontal tube of length 1.5 m and radius 1.0 cm. If the amount of glycerine collected per second at one end of the tube is 4 x 10
-3
Kg S
-1
. What is the pressure difference between the two ends of the tube ?
Density of glycerine is 1.3 x 10
3
Kgm
-3
and viscosity of glycerine is 0.83 Nm-2
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Solve this:
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Solve this:
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Q An iron ball of radius 0.3 cm falls through a column of oil of density 0.94 g/cubic cm . It is found to attain a terminal velocity of 0.5 cm/s. Determine the viscosity of oil . Density of iron is 7.8 g/cubic cm.
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
In a test experiment on a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are 70 ms
–1
and 63 ms
–1
respectively. What is the lift on the wing if its area is 2.5 m
2
? Take the density of air to be 1.3 kg m
–3
Answer
1
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Solve this:
Q.5. Under what conditions does the velocity of a body falling in a medium
(i) increase with time
(ii) become constant with time
(iii) become zero?
Answer
1
Varun Gupta
Subject: Physics
, asked on 18/3/18
Write short notes/summary of the given pages along with necessary Short Answer Questions with their answers
Answer
1
Varun Gupta
Subject: Physics
, asked on 18/3/18
5. How much work is done by pressure in forcing 1.4 m
3
of water through a pipe having an internal diameter of 13 mm if the difference in pressure at the two ends of the pipe is 1.0 atm?
6. A water pipe having a 2.5 cm inside diameter carries water into the basement of a house at a speed of 0.90 m/s and a pressure of 170 kPa. If the pipe tapers to 1.2 cm and rises to the second floor 7.6 m above the input point, what are the (a) speed and (b) water pressure at the second floor?
Answer
1
Varun Gupta
Subject: Physics
, asked on 18/3/18
Solvepractice problem 4
Answer
1
Varun Gupta
Subject: Physics
, asked on 18/3/18
In the given question please find the strain rate. No links please:
34. A flat plate of area 2m
2
is separated from a large plate by a layer of oil 2mm thick. if the coefficient of viscosity of this oil is 0.01 Pa s, what force is required to keep the plate moving with velocity of 5 cm/s. Also find the strain rate.
Answer
2
Varun Gupta
Subject: Physics
, asked on 18/3/18
Please solve giving full method, no links please.
Q.33. A garden hose with an internal diameter of 1.9 cm is connected to a (stationary) lawn sprinkler that consists merely of a container with 24 holes, each 0.13 cm in diameter. If the water in the hose has a speed of 0.91 m/s, at what speed does it leave the sprinkler holes?
Answer
3
Erw Trjerth
Subject: Physics
, asked on 18/3/18
Experts please answer the questions completely and no links please.
Q-1) Why two streamlines cannot cross each other?
Q-2) Give one point of similarity and difference between viscous force and solid friction?
Answer
1
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What are you looking for?
12. A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plae of mass M stationary at a height h=15m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is (Assume the collusion to be inelastic).
(A) 1 kg (B) 1.414 kg
(C) 2 kg (D) 10 kg
Q.12.15. At one point in a pipeline, the water's speed is 3.2 m/s and the gauge pressure is 5.00 × 104 Pa. Find the gauge pressure at a second point in the line, 1.0 m lower than the first, if the pipe diameter at the second point is twice that at the first.
Q12.16- At a certain point in a horizontal pipeline, the water's speed is 3m/s and the gauge pressure is 1.80 × 104 Pa. Find the gauge pressure at a second point in the line if the cross- sectional area at the second point is twice that at the first.
A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.2N. When the rock is totally immersed in water, the tension in 28.4 N. When the rock is totally immersed in an unknown liquid, the tension is 17.6N. What is the density of the unknown liquid?
Density of glycerine is 1.3 x 103 Kgm-3 and viscosity of glycerine is 0.83 Nm-2
Q.5. Under what conditions does the velocity of a body falling in a medium
(i) increase with time
(ii) become constant with time
(iii) become zero?
6. A water pipe having a 2.5 cm inside diameter carries water into the basement of a house at a speed of 0.90 m/s and a pressure of 170 kPa. If the pipe tapers to 1.2 cm and rises to the second floor 7.6 m above the input point, what are the (a) speed and (b) water pressure at the second floor?
34. A flat plate of area 2m2 is separated from a large plate by a layer of oil 2mm thick. if the coefficient of viscosity of this oil is 0.01 Pa s, what force is required to keep the plate moving with velocity of 5 cm/s. Also find the strain rate.
Q.33. A garden hose with an internal diameter of 1.9 cm is connected to a (stationary) lawn sprinkler that consists merely of a container with 24 holes, each 0.13 cm in diameter. If the water in the hose has a speed of 0.91 m/s, at what speed does it leave the sprinkler holes?
Q-1) Why two streamlines cannot cross each other?
Q-2) Give one point of similarity and difference between viscous force and solid friction?