Answer:
in mechanical waves
Explanation:
A mechanical wave is a disturbance that moves and transports energy from one place to another through a medium. In sound, the disturbance is a vibrating object. And the medium can be any series of interconnected and interactive particles.
Answer:
he longer ramp has more mechanical advantage for it requires less force to push up a mass while being over a longer period of time. Its called Mechanical Advantage because say you had to lift a car up 1-meter. you cannot simply pick it up, but over a long enough slope you would be able to because you can apply a small force over a longer distance
Explanation:
Answer:
it comes from your knowledge and the information you have to get the reason why that is the answer so you are putting together things that you already know what the new information you have
Answer:
Concrete absorbs visible light and re-radiates it as infrared energy.
Explanation:
As we know that concrete will not reflect 100% light incident on it but it will absorb few energy and remaining energy is reflected back.
So here when visible light incident on the concrete then few of its energy is absorbed by is and then the remaining energy is reflected back.
Since the reflected energy must be less than the energy which incident on the concrete so here we will say that the reflected waves must be of less frequency range
so here most appropriate energy range of reflected wave is infrared waves
so here correct answer will be
Concrete absorbs visible light and re-radiates it as infrared energy.
Answer:
26945.6 ft⋅lbf
Explanation:
Volume of Right Circular Cone = pi*(radius^2)*(height/3)
Pi*(4)*(5/3) = 20.94 ft^3
Density = Mass / Volume
Mass = Density*Volume
Mass = (40)*(20.94)
Mass = 837.6 lb
Work = Force*Height
Force = Mass*Acceleration
Acceleration will be gravitational acceleration
Work = (837.6)*(32.17)*(1)
Work = 26945.6 ft⋅lbf
