Physics SS3 2nd Term

The later development on the concept of the Green House Effect

One of the following is a factor to be considered in cleaning up the water bodies from oil spills.

• Depth of the water body.

• Temperature of the water body

• Type of oil spilled

• Type of shorelines.

The following are forms of energy, except ---

• Chemical energy

• Aquatic energy

• Solar energy

• Nuclear energy.

Oil spillage is predominant in one of the following areas in Nigeria.

• Middle belt

• Bendel

• Niger delta

• South west

The following are oil companies in Nigeria. Except ---

• Shell

• Chevron

• Agip

• NNPC

The mathematical expression showing the relationship between acceleration due to gravity 'g' and the gravitational constant 'G' is ---

• G=2gR

• g= GMr^2

• g= GMr^3

• Gg=gr

If a proton mass is 1.67×10^-27kg , an electron mass is 9.11×10^-31kg and the radius of hydrogen atom is 0.50×10^10m, calculate the gravitational attraction between the charges.

• 1.6×10^-47N

• 3.6×10^-47N

• 2.76×10^-37N

• 0.65×10^-57N

If the radius r of the earth is 6.4×10^6m and the acceleration due to gravity 'g' is 9.8m/s^2 , calculate the escape velocity of a rocket from the earth's gravitational field.

• 11×10^-3m/s

• 11×10^3m/s

• 1.1×10^-3m/s

• 11m/s

Calculate the gravitational attraction between two spheres whose centres are 4m apart and whose masses are 16kg and 24kg respectively. (G=6.67×10^-11Nm^2kg^-2).

• 1.1×10^4N

• 2.1×10^4N

• 1.6×10^-9N

• 4.1×10^-11N

Calculate the total resistance of three resistors of values 2Ω, 3Ω and 4Ω connected in parallel.

• 9Ω

• 24Ω

• 0.92Ω

• 5Ω