find the average speed of a plane that leaves Bristol at 14.00 and lands in and lands in Edinburgh at at 17 . 15, the distance travelled in 1200 miles

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory