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Olushola

Questions (23)

A block and tackle system with six pulley system on which an effort of 50N is just able to lift a load of weight W.if the
1. 1 answer
2. 655 views
A machine with a velocity ratio of 30 moves a load of 3000N when an effort of 200N is applied. The efficiency is?
1. 2 answers
2. 839 views
How much energy is require to set a 0.304m phonograph record into rotation at 33.33 revolution per minute if the mass of the
1. 1 answer
2. 515 views
An antiaircraft gun fires at an elevation of 60° at an enemy aircraft at 10,000m above the ground. At what speed must the
1. 1 answer
2. 1,864 views
A stone is thrown vertically upward with an initial speed u.if is the acceleration due to gravity,at what time will the stone
1. 0 answers
2. 594 views
A cannon ball is projected so as to attain maximum range. Find the maximum height attained if the initial velocity is u
1. 0 answers
2. 662 views
Consider the carbon atom whose nuclear mass is 11.996amu.calculat mass defect when proton=1.00728amu,neutron=1.00867amu
1. 0 answers
2. 466 views
In the uranium mass 235,the binding energy was estimated as 3.0×10^-11Joules.Determine the energy released by 1g of uranium.
1. 1 answer
2. 640 views
The electron in a helium ion moves from a Bohr's orbit whose principal quantum number is 4 to another whose quantum number is
1. 1 answer
2. 580 views
Evaluate the value of the Bohr orbit in a hydrogen atom whose principal quantum number is 1.
1. 1 answer
2. 473 views
The assertion that 1g of uranium can produce energy equivalent to 10kg of coal implies that
1. 2 answers
2. 725 views
Which of the following characteristics x-ray photon emission?(a)electron capture (b)beta-decay (c)positron emmision
1. 1 answer
2. 592 views
Which of these is odd in the series?(a)sodium (b)sulphur (C)plutonium (d)francium
1. 1 answer
2. 414 views
The equation of the reaction between 2 moles of proton and 2 moles of neutron producing Helium particles is a practical
1. 0 answers
2. 551 views
Which of these is not associated with camp ton effect?(a)when energy exceeds 1.02MeV. (b)energy of gamma-ray become less.
1. 0 answers
2. 490 views
The energy of transition of an electron from 5th to the 3rd Bohr orbit of a hydrogen atom
1. 1 answer
2. 623 views
The mass defect in a certain nuclear reaction is 0.108a.m.u.Determine the energy released in the reaction
1. 1 answer
2. 542 views
Element Y has a half life of 50days. How much of a 100mg of its sample will remain after 5 month?
1. 1 answer
2. 513 views
The most covalent of the chlorides; LiCL,BeCL2,MgCL2 and AlCL3 is(a)MgCL2 (b)AlCL3 (c)Licl (d)BeCL2
1. 1 answer
2. 704 views
The hydride of group VIA element are-Option (a)volatile covalent gases (b)volatile covalent solids (c)volatile covalent liquids
1. 2 answers
2. 618 views
The coordinates of a point p(a,2a) of line of point m(2a,3) and n(4,3). Find the value of a
1. 2 answers
2. 448 views
A block of weight 7.0N rest on a level floor. The frictional force between the block and the floor is 1.0N, A horizontal force
1. 1 answer
2. 1,217 views
A mass of 5Kg is 1st weighed on a balance at the top of a tower 20m high.The man is then suspended from a fine wire 20m long and
1. 3 answers
2. 3,727 views

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