With reference to the text, Give two reason why the zoo director wrote to the offical in the Warsaw.​

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.