Qual o valor da massa de um corpo de densidade de 100 g/ml e volume de 300ml? a 30 3 g 30.000 g 15.000 g

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?