It's velocity when it strikes the ground is. D. 232.9 kg.m/s<span>.
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Answer:
Electrons in different metals
Explanation:
When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.
Your answer would be 0.20 Hz
Answer:
As with any wave the speed of sound depends on the medium in which it is propagating.
Explanation: