In which sporting even does air resistance have the largest effect on performance: 100 m sprinting, 10,000 m running, or 500 m speed skating

Which type of wave can travel without a medium

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g

How can a cyclist's acceleration change even if its velocity remains constant?