Answer:
the ratio of her final kinetic energy to her initial kinetic energy is 1.7.
Explanation:
Given;
initial angular speed, ω₁ = 5.9 rad/s
let her initial moment of inertia = I₁
her final moment of inertia
Apply the principle of conservation of angular momentum to determine the final angular speed of the girl;
The initial rotational kinetic energy is given as;
The final rotational kinetic energy is given as;
The ratio of her final kinetic energy to her initial kinetic energy is given as;
Therefore, the ratio of her final kinetic energy to her initial kinetic energy is 1.7.
Hello!
Mass, a weight.
Gravity, force.
Translated the Turkish.
Kütle, bir ağırlıktır.
Yer çekimi, insanın yere uyguladığı kuvvet.
Answer (Turkish : Cevap)
True (Doğru)
Have a nice day! ( İyi günler!)
Answer:
16,926
Explanation:
Q = mCΔT
Q = 30.0g × 45.5 × (45.5 - 32.1)
Q = 30.0 × 45.5 × 13.4
Q = 16,926
IMPORTANT NOTE:
Q = Heat
m = mass of sample
C = specific heat
ΔT = Change in temperature
Answer:
D. the amount of chemical energy equals the amount of heat and light energy.
Explanation:
Given that the first law of thermodynamics affirmed that energy is neither created nor destroyed however, it can be transformed from one form to another. In other words, while, during the transformation of energy, no energy is lost, the input energy is also equal to output energy.
Hence, the chemical energy stored in the log is EQUAL to the heat and light energy produced by burning.