Theories have both an explanatory an a predictive function. True
Answer:
Commutator reverses the flow of current through an electric motor
Explanation:
Gravitational potential energy is equal to (mgh) so 1.5•9.8•200=2940
Or C
Answer:
0.477 Hz
2.09 s
Explanation:
y = A sin(ωx − φ)
A is the amplitude, ω is the angular frequency, and φ is the phase shift.
ω = 3 rad/s
f = ω / 2π ≈ 0.477 Hz
T = 1/f ≈ 2.09 s
Scientists use models of volcanoes to , Determine their intensity.
So the answer is B.
Hope this helps!
