An object of mass 1200kg is made to move on a surface by a constant force of 500N. Calculate the frictional force between the surface and the object.

What name is given to semiconductors which become increasingly better conductors as they get warmer?

State the formula for linear expansivity?

What is the other name for linear expansion?

When is dew formed?

What do we call the angular dispersions per mean deviation of a prism or lens?

Calculate the power of the lens were light rays passing through it will meet (intersect) 80cm from the optical center

Calculate the length of a simple pendulum that will have a period of exactly 1second,taking g=9.8m/s2

An object is released from an aeroplane which is 2000m above the earths surface. What will the magnitude of the air resistance on this object of mass 200g after attaing a terminal velocity?

Name one party of the electromagnetic spectrum which is used together with mercury vapour to off light?

Calculate the increase in length of a 20m steel gider in a building when the temperature changes from 00 C to 300C.

LASER are used in physics in different ways. What do the letter stand for?

What do we call a law that states that the rate of laws of heat of a body by cooling in a steady stream of air is proportional to the excess temperature of the body above its surroundings.

What do you call a constant where the potentional is divided by current passing through a conductor?

A radio active element of atomic mass 20 and atomic number 10 emits a beta particle followed by an alpha one. What mius the atomic resulting nucleus?

A gas cylinder of cross sectional area 2m2 and height 18m is filled with mair of mass 90g.Calculate the density of air?

Two resistor A and B are each of resistance 2 ohms and 3 ohms are connected to a 4 ohms resistor which is in series to A and B.Calculate the total resistance of the three resistors?

What do call you the potentional energy which is due to elevation position?

What is the frequency of the wave having a period of 0.2seconds?

A tank 4m long ,1m wide and 0.5m deep is half filled with mercury of 12000N.What the pressure on the base of the tank due to the mercury/

Calculate the change of a point in a circuit allowing a current of 0.4amps to flow in 2 minutes.

Find the efficiency of an electric motor capable of pulling a mass of 50kg through a height of 30m after consuming 60KJ of electric energy,take g=10m/s2

Calculate the speed on an object of mas 2kg which is dropped from a 20m cliff upon hitting the ground take g=10m/s2

An aircraft flies 400km south and then 300km west. Calculate its displacement from the starting point?

W hat is a trajectory?

What is angular velocity?

A meter rule is pivoted at 25cm mark and balanced by a 0.5N weight suspended at 5cm mark. What is the mass of this rule.

Convert -93 to Kelvin’s?

Calculate the minimum force needed to prevent an object with a mass of 40kg from sliding down a slope which forms an angle of 30 o with the horizontal

What is the name of the process by which two gases mix because of their molecular movement? (One attempt)

What is emitted by the hot metal filament in a cathode-ray tube?

What are the SI units for light intensity?

What name is given to the semi conductors which become increasingly better conductors as they get warmer?

How much current flows through the water heater which is connected to a 24V supply and using 4KM.

What is a transducer?

The emission of electrons when light falls upon certain metals is called?