A bus moves 30 km in 30 minute towards north and then takes a u turn and travels the next 40 km in 60 min calculate the average speed and average velocity for the entire journey​

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o

The mantle is made up of which structural zones?