D. velocity
Velocity depends on speed and direction
Answer:

Explanation:
The energy of a photon is:
when h is the Planck constant.

Then, we calculate the energy of a photon with a wavelength equal to 550 nm.

To find the number of photons we can use this equation:

Have a nice day!
A, b, d, c, c, d, a, b, c, b, ultrasound, sound, sonar, harmonics, vibration, true, false, false, true, true
Power = (work done) / (time to do the work)
Work done = (force to lift the object) x (distance lifted)
In this question, the force is the (weight of the basket)+(your weight).
Work done = (weight of basket+you) x (3 meters)
Time to do the work = 6 seconds.
Power = (weights x 3 meters) / (6 seconds)
<em>Power = (1/2)·(weight of the basket+you, in Newtons) watts</em>
Yup displacement covered /time taken. bcz both velocity and displacement are vectors