According to the second law of thermodynamics,
the answer is
<span>4. The entropy of the universe is increasing. </span>
Answer:
1 is c 2 is a and 3 is b hope that helped!
Answer
given,
mass of the piano = 170 kg
angle of the inclination = 20°
moves with constant velocity hence acceleration = 0 m/s²
neglecting friction
so, force required to pull the piano
F = m g sin θ
F = 170 × 9.81 × sin 20°
F = 570.39 N
so, force required by the man to push the piano is F = 570.39 N