Which of the following representations is correct for an atom X with 28 electrons and 30 neutrons?

The velocity ratio of an inclined plane where angle of inclination in θ is

When two mirrors are placed at an angle of 900 to each other, how many images will be formed when an object is placed in front of the mirrors

Calculate the time taken for a mango fruit that fall from the tree 20 m to the ground [g = 10 ms-2]

What is the cost of running seven 40 W lamps and five 80 W la mps for 12 hours of the electrical energy cost N7.00kWk?

The volume of a fixed mass of gas is 10cm3 when its pressure is 400cmHg. Determine the volume of the gas when its pressure is 200cmHg.

Which of the following is not a mechanical wave?

Calculate the angle of minimum deviation of a 60o prism of a refractive index [sin-10.75 = 49o]

If silicon is doped with phosphorus, what type of semiconductor material will be formed?