Question
Which material is used as a moderator in a nuclear power
plant that slows down the neutrons and makes them fit for causing fission?Solution
In a nuclear power plant, materials such as graphite  or heavy water (deuterium oxide, D₂O) are used as moderators. These materials slow down the neutrons, making them more likely to cause fission when they interact with nuclear fuel.
In nine innings of cricket, the average of a batsman is 59 runs. How many runs does he need to make it in the tenth inning to get the average score of 62?
Average age of company A is 23 years and average age of both companies A and B is 15 years. If the ratio of number of employees in company A and B is 3:...
The average number of sweets distributed in a class of 90 students is 6. If lsquo;xrsquo; number of students newly joined the class and the average beco...
X and Y have weights of 36 kg and 60 kg, respectively. Z weighs 12 kg less than X. Calculate the average weight of X, Y, and Z.
The average weight of a group of 5 men increases by 2 kg when a new person weighing 78 kg joins the group. What was the average weight of the group befo...
The average age of a class of 24 girls is 16 years. If 6 new girls having average age of 12 years join the class, then the average age of the class beco...
The average weight of 10 books is 5 kg. If 6 new books are added, the new average increases by 3 kg. What will be the average weight of the 6 new books?
The average marks of 30 students in Class I is 60. The average marks of some students in Class II is 75. When all students of both classes are taken tog...
The average cost of three chairs is Rs.10000. The average cost decrease by 12% when one more chair is included. What is the cost price of the 4th
There are 15 numbers such that average of first 12 numbers is 65 while the average of last five numbers is 76. Find the 12th number, if the ratio betwee...
