A train travels 84 kilometers in 1 hours, and then 85 kilometers in 3 hours. What is its average speed?

Which set of compounds is arranged in order of increasing magnitude of lattice energy? which set of compounds is arranged in order of increasing magnitude of lattice energy? csbr < cao < kf cao < kf < csbr kf < csbr < cao csbr < kf < cao?

Which material cannot be made into a magnet? nickel aluminum iron cobalt

What kind of diet is best for a type two diabetes person?

Which direction does air pressure exert force at sea level

Why should people pay attention to scientists when making decisions? A) scientist are the smartest people B) Scientist make up facts that they wish true C) scientist use experiments to test their ideas D) scientist are always correct

A tire swing is released from some initial height such that the speed of the tire at the bottom of the swing is 2.5 m/s. What is the initial height of the tire? Note: g = 9.8 m/s2 A 0.13m B 0.16m C 0.32m D 3.1 m

Paleoclimatologists study the climate and its changes throughout earths history. what observation by paleoclimatologists led scientists to predict that the average temperature of the planet is rising due to the combustion of fossil fuels?

Which is bigger, a kilometer or a mile?

A coach wants her team to have fun, win some games, and be a productive unit. What is the most important personality trait the coach should demonstrate to achieve her goals? sportsmanship leadership persistence discipline

You slide a box of books at constant speed up a 30° ramp, applying a force of 200 n directed up the slope. the coefficient of sliding friction is 0.18.