Answer:
150J
Explanation:
work output/work input=100%
so just make work output the subject
Answer:
D. The frequency is not affected as the volume of sound increases
Explanation:
Volume of the sound is defined by the amplitude of the wave or how loud a sound is whereas Frequency is basically the pitch of the sound and is inversely proportional to the wavelength . Increasing frequency will increase the pitch of the sound without affecting it's volume.
Answer:
F » magnetic force
B » magnetic flux density
l » length / circumference
r » radius
