4. The distance covered by a car at a time, t is given by x = 20t + 6t4 , calculate (i) the instantaneous velocity when t = 1 (4) (ii) the instantaneous acceleration when t = 1

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass