Aball has 2 kg* m/s of momentum when thrown with a velocity of 8 m/s outwards. find the mass of the ball.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?