Answer: two waves with identical crests and troughs meet
Explanation:
My teacher gave me the answer
An incandescent bulb produces light that comes from the heating of a filament. A compact fluorescent bulb produces light when a substance is hit by electromagnetic radiation. Compact fluorescent bulbs are more efficient than incandescent bulbs.
The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes. Therefore, a system with lower heat emissions would be more efficient.
The second law of thermodynamics states that the total entropy of an isolated system (the thermal energy per unit temperature that is unavailable for doing useful work) can never decrease. In our context, it means that the system with the least amount of losses would be more efficient. As a conclusion the fluorescent bulb would be more efficient.
Answer:
The minimum velocity required is 7.923 m/s
Explanation:
The minimum speed required shall be equal to the speed that allows the camera to just reach a height of 3.2 meters
This can be solved using the third equation of kinematics as
where
v = final speed of object
u = initial speed of object
s = is the height attained
Since finally velocity becomes zero thus the above equation reduces to