Scientists conduct multiple trial experiments because one test might not be as reliable as multiple trials. Another reason they conduct multiple trials is because the scientific method says to conduct multiple experimental tests.
Answer:
The male skater's velocity is 13.71 m/s.
Explanation:
From the law of conservation of momentum:
m1u1 = (m1 + m2)u2
m1 is the mass of the male skater = 78.2 kg
m2 is the mass of the female skater = 48.5 kg
u1 is the velocity of the male skater as a result of the push
u2 is the velocity with which the male skater pushed away the female skater = 8.46 m/s
u1 = [(78.2+48.5)8.46] ÷ 78.2 = 1071.882 ÷ 78.2 = 13.71 m/s
In radio communication, "amplitude modulation" refers to encoding a wave with information by adjusting the height (amplitude) of the waves. <em>(a)</em>
The dispersive power of the material of the prism is independent of the shape, angle of prism or size of the prism. It depends only on the refractive index 
of the material of the prism.
Answer:
c
Explanation:
if numbers of protons and electrons are equal, the atom is neutral
