Power = (work) divided by (time to do the work)
500 joule/sec = (1.5 x 10⁵ J) / (time)
Multiply each side
by time: (time) x (500 joule/sec) = 1.5 x 10⁵ J
Divide each side
by 500 J/sec: Time = (1.5 x 10⁵ J) / (500 J/sec)
= (1.5 x 10⁵ / 500) (J-sec/J)
= 300 sec
= 5 minutes .
Answer:
0.52rad/s^2
Explanation:
To find the angular acceleration you use the following formula:
(1)
w: final angular velocity
wo: initial angular velocity
θ: revolutions
α: angular acceleration
you replace the values of the parameters in (1) and calculate α:
you use that θ=22 rev = 22(2π) = 44π
hence, the angular acceñeration is 0.52rad/s^2
Answer:
Explanation:
The car is under an uniforly accelerated motion. So, we use the kinematic equations. We calculate the acceleration from the following equation:
We convert the initial speed to
The car stops, so its final speed is zero. Solving for a:
Answer:
2.7 J
Explanation:
The energy of one photon is given by
where
h is the Planck constant
f is the frequency
For the photons in this problem,
So the energy of one photon is
The number of photons contained in 1.0 mol is
(Avogadro number)
So the total energy of photons contained in 1.0 mol is