Answer:
Positive velocity changing velocity and acceleration.
Explanation:
Answer:
d)constructive interference
Explanation:
- For any two waves being equal in wavelength and in phase with each other will always lead to a constructive interference when there is a superposition of those two waves.
- Two waves being in phase means that each corresponding highs and low are aligned with each other. Their corresponding peaks occur at the same instant and at the same position.
- The two waves that are in phase can have a phase difference of one cycle i.e. 2π because after every cycle a wave repeats itself.
Answer:
Explanation:
In order to solve this problem we need to apply the Energy Conservation Theorem, The motion occurred on the ground so the potential gravitational energy is zero.

We need to calculate the work done by the friction force.
the friction force is given by:

The work is given by:

The angle of the force is 180 degrees because it is opposite to the motion.

applying the theorem:


We are given
E = <span>2.64 × 10-21 J
h = </span><span>6.6 × 10-34 J s
The options given below are frequencies, therefore, the question must be asking about the frequency fo the given wave
The equation is
E = h f
Simply substitute and solve for f which is the frequency
f = </span>2.64 × 10-21 J / 6.6 × 10-34 J s
f = <span>4.00 × 1012<span> hertz</span></span>