Protons were discovered by
In 1911 Ernest Rutherford who performed many experiments to explore radioactivity did an experiment in which he discovered that the atom must have a concentrated positive centre charge that contains most of the atom’s mass. He suggested that the nucleus contained a particle with a positive charge the proton.
The value of a motor cycle 2 years ago was ₹ 70,000. It depreciates at the rate of 4% p.a. Find its present value.
Find the greatest number which when divide 120,133 & 152 leave remainder 3, 7 & 8 respectively?
A can do a piece of work in 8 days and B can do the same piece of work in 12 days. A and B together complete the same piece of work and get ?200 as the...
If 18 men working 18 hours a day can make 18 quilts in 18 days, then in how many days 27 men working 12 hours per day will make 27 quilts?
Find the G.C.D. of the following:
35x5 y3 z4, 49x² yz3, 14xy2 z²
10 lakh candidates write the TNPSC Exam this year. If each exam centre is allotted with 1000 candidates. How many exam centres would be needed?
The cost of a machine is ?18,000 and it depreciates at 16(2/3)% annually. Its value after 2 years will be
If Karkuzhali earns ₹ 1,800 in 15 days, then she earns ₹3,000 in ___________days.
A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?
The speed of motorboat in still water is 34 km/hr. It takes 6 hours to go 120 km upstream. Find the time taken by the motorboat to return the same dista...
