Swimmers can foat more easily in ocean water than freshwater. The most likely reason is that the

What is the mass of a 500 ml sample of seawater with a density of 1.025 g/ml?

An unknown powder has a constant melting point and doesn't chemically separate into other substances

Rust forms on an iron pipe after prolonged exposure to humid air. What type of change is this?

What are the coefficients that will balance PbO2 yields PbO + O2

The structure of pure water makes it a good

Which bike rider has the greatest momentum?

All the following are in DNA except

Ultraviolet radiation can cause mutations in the DNA of skin cells. Why won't it effect offsprings ?

Single celled organisms from pond water with a nucleus and either cilia or flagella belong to

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