Acar travels from stop a to stop b with a speed of 30 km/h and then returns back to a with a speed of 50 km/h. find -> (i) displacement of the car. (ii) distance travelled by the car. (iii) average speed of the car.

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?