Olushola

This page lists questions and answers that were posted by visitors named Olushola.

Questions

The following questions were asked by visitors named Olushola.

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 reweivhed.find the difference in a weight ,assuming that the radius of the earth is 6400km,the mass of the earth is 6×10^24kg...

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 of 1.4N is used to pull the block for 4s.what is the velocity of the block after this time?

The coordinates of a point p(a,2a) of line of point m(2a,3) and n(4,3). Find the value of a

The hydride of group VIA element are- Option (a)volatile covalent gases (b)volatile covalent solids (c)volatile covalent liquids (d)volatile ionic liquids

The most covalent of the chlorides; LiCL,BeCL2,MgCL2 and AlCL3 is (a)MgCL2 (b)AlCL3 (c)Licl (d)BeCL2

Element Y has a half life of 50days. How much of a 100mg of its sample will remain after 5 month?

The mass defect in a certain nuclear reaction is 0.108a.m.u.Determine the energy released in the reaction

The energy of transition of an electron from 5th to the 3rd Bohr orbit of a hydrogen atom

Which of these is odd in the series? (a)sodium (b)sulphur (C)plutonium (d)francium

Which of the following characteristics x-ray photon emission? (a)electron capture (b)beta-decay (c)positron emmision (d)gamma-decay

The assertion that 1g of uranium can produce energy equivalent to 10kg of coal implies that

Evaluate the value of the Bohr orbit in a hydrogen atom whose principal quantum number is 1.

The electron in a helium ion moves from a Bohr's orbit whose principal quantum number is 4 to another whose quantum number is 6.calculate the energy of transition in this process.

In the uranium mass 235,the binding energy was estimated as 3.0×10^-11Joules.Determine the energy released by 1g of uranium.

An antiaircraft gun fires at an elevation of 60° at an enemy aircraft at 10,000m above the ground. At what speed must the cannon be shot to hit the plane at that height.

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 record is 0.11kg?

A machine with a velocity ratio of 30 moves a load of 3000N when an effort of 200N is applied. The efficiency is?

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 efficiency of the machine is 40%,find the value of W.

Answers

The following answers were posted by visitors named Olushola.