Bissoy.com
Doctors Medicines MCQs Q&A

A sheet with an initial thickness 30 mm is rolled in two high mills with entering velocity of 5 mm/sec. Find the final thickness of sheet if the exit velocity of rolled sheet is 25 mm/sec?

A sheet with an initial thickness 30 mm is rolled in two high mills with entering velocity of 5 mm/sec. Find the final thickness of sheet if the exit velocity of rolled sheet is 25 mm/sec? Correct Answer 6mm

By using the consistency of volume, the total volume of the material remains the same before and after rolling. So mathematically: -> h1v1=h2v2 -> where h1, h2 is initial and final height, v1 and v2 are entering and exit velocity. -> 30*5=h2*25 -> V2=6 mm.

Related Questions

A sheet with an initial thickness 30 mm is rolled in two high mills with entering velocity of 5 mm/sec. If the final thickness of sheet is 15 mm find the exit velocity of rolled sheet?
In the given diagram, the sheet of thickness h1 is reduced to thickness h2. Find the correct relation between the velocity of the sheet? Where v1 is entering velocity and v2 is exiting velocity. Assuming the width of the sheet is constant.
A sheet of thickness 200 mm is rolled in a roller with roll diameter of 300 mm. If the coefficient of friction between the roll and sheet is 0.1. Find the minimum number of passes required to reduce the thickness of sheet to 180 mm?
Thickness of 8 tyres L, M, N, O, P, Q, R and S is compared. Thickness of no two tyres is same. Thickness of N is more than L but less than 6 tyres. Thickness of O is more than M but less than Q. Thickness of P is less than only two tyres. Thickness of Q is not more than P. Which of the following statement is not correct?
A rocket has a throat area of 10 mm2 and nozzle exit area of 25 mm2. If the mass flow rate of its propellants is 2 kg/s, exit velocity is 30 m/s, and if exit pressure is twice the standard atmospheric pressure at sea level, what will be the total thrust?
P, Q and R invested in a business for 2.5 years, such that P’s initial investment was 60% more than Q’s initial investment, while R’s initial investment was 25% less than P’s initial investment. After 10 months, each of them invested 25% of their initial investment. What part of the total profit will P received after 2.5 years?
The difference between the speed along and against the river is 8 km/h and the time taken to cover a journey from initial to final point and return to initial point is 3 hr. What is speed along with the river if the distance between the initial and final Point is 9 km?
The angle of elevation of the top of a 36 m tall tower from the initial position of a person on the ground was 60 deg. She walked away in a manner that the foot of the tower, her initial position and the final position were all in the same straight line. The angle of elevation of the top of the tower from her final position was 30 deg. How much did she walk from her initial position?
What should come in place of question mark (?) in the following question? 2.3̅9̅ + 5 + 6.2̅5̅ + 0.0̅8̅ = ?
In each question below is given one/more statements that followed by two assumptions numbered I and II. Consider the statement and decide which of the given assumptions is implicit. Statement: Soon after the voting for the third and last phase of Bihar assembly elections concludes on November 7th evening, the television channels will begin airing exit polls. Assumptions: I.Exit polls help to predict the results. II.Exit polls are always the same as results.