Solution :
The angular acceleration, is obtained from the equation of the of rotational motion,
Thus,
or
where is torque, F is force, d is moment arm distance, I is the moment of inertia
Thus,
Now if the force and the moment arm distance are constant, then the
That is when, F = d = constant, then .
Thus, moment of inertia, I is proportional to mass of the bar.
The mass is less for the bar in case (1) in comparison with that with the bar in case (2) due to the holes that is made in the bar.
Therefore, the bar in case (1), has less moment of inertia and a greater angular acceleration.
The energy if of a photon is (Planck's Konstant) x (frequency).
Planck's Konstant is 6.62607004 × 10⁻³⁴ m²-kg/s .
So the photon's energy is
(6.626 × 10⁻³⁴ m²-kg/s) x (4.89 x 10¹⁴ / sec)
= (32.4 x 10⁻²⁰) m²-kg/s²
= 3.24 x 10⁻¹⁹ joule
Answer:The kinetic energy of the water molecules decreases. ... The motion of the particles in the substance decreases, and the temperature of the substance increases.
Explanation:
Answer:
10 seconds
Explanation:
As it starts from rest, then u=0
and by III rd equation of motion:
The answer to your question is A!