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High-pitched sound has a high

A sonic boom cannot be produced by

The planet Earth loses heat primarily by

If glass expanded more than mercury in a thermometer, then with rising temperature the column of mercury would

The fundamental force underlying all chemical reactions is

Musical tones are characterized by

An electric razor in Europe completes 50 vibrations in 1 s. The frequency of these vibrations is

Electrical resistance is greater for

Transparency of the atmosphere is lowest for radiation of

As ice is changed to water, energy is