Samuel adds a teaspoon of salt to a glass of water. he notices that the salt disappears. samuel takes a dip to discover that the water tastes salty. what kind of change has occurred

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.