It's still 20 kg. Mass doesn't change according to gravity, only weight changes.
Answer:
an apple falling off a tree
Explanation:
Answer:
The frequency of the sound wave is 800Hz
The speed of sound in a is about 340m/s.
Velocity = frequency x wavelength
making wavelength the subject formula
wavelength = Velocity/frequency.
wavelength = 340/800
wavelength = 0.425m.
1. mass
2. weight
3. weight
4. weight
5. mass
6. mass
Answer:
This is because The energies of atoms are quantized.
Electrons are allowed "in between" quantized energy levels, and, thus, only specific lines are observed
