A train travels the distance from Blaenau Ffestiniog to Wrexham in Wales in 2 hours and 15 minutes. If these two places are 135 km apart, what is the average speed of the train in kilometres per hour?

Study the following reaction carefully. what classification should this reaction have? 4al + 3o2 2al2o3synthesisdecompositionsingle replacementdouble displacement

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?