A particle is moving in a straight line with initial velocity u and uniform acceleration a. If the sum of the distances travelled in tth and (t + 1)th seconds is 100 cm, then its velocity after t seconds in cm s-1 is
Select the setup in which the plank will not move at all but may break. Let the fulcrum not be fixed permanently on the plank.
If a = 0.1001000100001... and
b = 0.101001000100001......, then which of the following is true?
(a) a and b are both irrational numbers and a > b.
(b) Two irrational numbers between a and b are 0.1002000100001000001... and 0.10021001000100001... .
(c) a and b both are rational numbers and a < b.
(d) None of these
Ritesh wants to make a list of actions that show that friction produces heat. Which of the following actions can he include in his list?
(i) Rubbing hands together
(ii) Scratching a match stick against the match box
(iii) Sawing wood
(iv) Drilling a hole into metal sheet
(v) Rubbing off some pencil marks with an eraser
A(i) and (iv)
B(i), (ii) and (v)
C(i), (ii), (iii) and (v)
DAll of these
In the given Venn diagram, the point represents
ABurning of paper
BFormation of curd from milk
CBurning of candle
DBoth B and C.
Wool industry is an important means of livelihood for many people in our country. But sorters’ job is risky as sometimes they get infected by a _______ called _______,
which leads to a fatal lung disease called sorter’s disease.
A Bacterium, Bacillus anthracis
B Bacterium, Escherichia coli
C Fungus, Salmonella typhimurium
D Virus, Vibrio anthracis