4. Draw a diagonal scale of RF = 3/100 showing metres, decimetres and centimetres, and to measure up to 4 m.
Show the length 3.19 m on it.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

What is a monomer? how do they form a ploymer from the view point of chemical bonding?