f = 40 Hertz
Explanation:
Velocity of a wave = frequency × wavelength
frequency = velocity/wavelength
20m/s = f × 0.50
20/0.50 = f
40 Hertz = f or f = 40 Hertz
Atoms are composed of electrons in a cloud around a positive nucleus.
1.) when components are needed to be used in different ways
2.) sublimation, filtration, evaporation, and distillation
Answer:multiple periods of warmer, and there are natural cycles or warmer.
Explanation: trust me
Explanation:
D. The total mass of the reactants equals the total mass of the
products.
