Related Questions

For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume.
A 10
B 25
C 50
D 75
If S is the sum of three angles of a spherical triangle, the spherical excess equals
A S - 90°
B S - 180°
C S - 270°
D S - 360°
When the weight of a ball inside the ball mill is just balanced by the centrifugal force,
A The ball abandons its circular path for a parabolic path
B The ball abandans its parabolic path for a circular path
C The ball continues to move on a circular path
D The ball continues to move on a parabolic path
This is a solid shape that fits inside the mold and forms a hole in a cooled cast metal or molten plastic object:
A Core
B Cavity
C Prototype
D Hole mold
A ball and a bat costs 110 taka. The bat costs 100 taka more than the ball. How much does the ball cost ?
A 5
B 10
C 15
D 100
A box contains 21 balls numbered 1 to 21 . A ball numbered 1 to 21 . A ball is drawn and then another ball is brawn without replacement . What is the probability that both balls are even numbered?
A 2/7
B 3/14
C 8/21
D 5/21
A bag contains 7 red, 9 yellow and 3 black balls. If a ball is picked at random, what is the probability that the ball drawn will be either a red of a black ball.
A 7/19
B 9/19
C 10/19
D 11/19
A sport goods store ordered an equal number of white and yellow tennis balls. The tennis ball company delivered 30 extra tennis ball, making the ratio of white balls to yellow balls 6:5, How many tennis ball did the sport goods store originally order?
A 150
B 180
C 300
D 330
At a stationary shop, it costs Tk. 185 for 4 gel-pen, 8 ball -point pens and 1 marker pen and Tk. 315 for 7 gel-pens, 15 ball point pens and 1 marker pen. What would be the cost of 1 gel-pen, 1 ball -point pen and 1 marker pen?
A Tk. 45
B Tk. 55
C Tk.60
D Tk.70
A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
A 0.25
B 0.50
C 0.75
D 1.0

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