Answer:
It cannot reach us by conduction or convection as there is no medium such as air in most part of the space between the earth and the sun. From the sun the heat comes to us by another process known as radiation. The transfer of heat by radiation does not require any medium.
so for the first one it will be longitudinal wave then the second is transverse wave and the third is electromagnetic wave
Answer:
320m
Explanation:
The vertical displacement is given by:
Assuming v₀=0, t=8:
Answer:
1.25 rev/s
Explanation:
N = mv^2/r (normal force )
f = μN [Frictional force ]
f = mg
μN = mg
μ(mv^2/r) = mg
v = √(rg/μ)
min rotational velocity
v = √(rg/μ) = √(2.5 * 9.8/0.40) = 7.83 rad/sec
= 7.83/2π = 1.25 rev/s
Answer:
Given Acousting power P=2.35*10^5W
Distance r=51.3m
Area=4πr^2=4*3.142*51.3^2=33075.08
Sound intenstity I= (2.35*10^5)/33075.08=6962.8W/m^Reference sound intenstity Io=10^-12w/m^2
Sound intenstity I1=10*log(I/Io)
10*log(6962.8/10^-12)db =24.5w/m^2