Is crumbeing a sheet of paper phcsail or chemical change

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

Select the three ways that the parallel-plate capacitor differs from a car battery.

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem