you all ***** .......... giving wrong answer ..
A company produces batteries whose lifetimes are normally distributed with a mean of 100 hours. It is known that 90% of the batteries last at least 40 hours. (i). Estimate the standard deviation lifetime. (3 marks) (ii). What percentage of batteries will not last 70 hours?
A model rocket has a mass of 3.00 kg. It is fired so that when it is 220 m above the ground it is travelling vertically upward at 165 m/s. At that point its fuel runs out so that the rest of its flight is without power. Assume that the effect of air friction is negligible and ...
A net force of 5.75 * 103 N [180degree] acts on a mass of 23.0 kg. If, while the force acts, the mass travels through a displacement of 360 m [210 degree], what work did the net force do on the object? Into what form of energy was this work transferred?
What is the direction of the total electric field at any point on the axis where
Solve z/3 = 5/4
Determine the moment of inertia for three children weighing 57.0 lb, 42.0 lb and 78 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.
A disk with a mass of 16 kg and a radius of 41 cm is mounted on a frictionless horizontal axle. A string is wound many times around the disk and then attached to a 70-kg block, as shown in the figure. Find the acceleration of the block, assuming that the string does not slip.
a library was mistakenly charged sales tax on an order of children's books, the invoice, including 5% sales tax, was for $1323. how much should the library have been charge?
give me answer show that one and only one out of n,n+4,n+8,n+12 and n+16 is divisible by 5, where n is any positive integer
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