So this form of energy is gravitational potential, which is defined as mass*height*gravity so if we use gravity as 10 m/s^2 to keep it simple we can do 150kg*10m*10m/s^2 and we get a total of 15,000 joules
Energy ,E= Sqrt{Energy intensity*Speed of light*Magnetic constant}
Where,
Energy intensity = 1.40 kW/m^2 = 1400 W/m^2
Speed of light = 3*10^8 m/s
Magnetic constant = 4pi*10^-7 H
Therefore,
E= Sqrt{1400*3*10^8*4*pi*10^-7} = 726.49 v/m
Now,
Emax = E*sqrt (2) = 726.49*Sqrt(2) = 1027.41 v/m
Sounds are reflected best when bounced off the flat surfaces.
<h3>What is a sound wave?</h3>
A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.
Since sound waves cannot easily pass through hard surfaces, they bounce off them instead, reflecting back to the source which they first came from.
When sound is reflected off of flat surfaces, it does so most effectively.
Hence the flat surface is the correct answer.
To learn more about the sound wave refer to;
brainly.com/question/11797560
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<span>9.16 meters
First, split the velocity into horizontal and vertical components.
h = 21 cos(47°) = 21 * 0.744270977 = 15.62969052 m/s
v = 21 sin(47°) = 21 * 0.731353702 = 15.35842773 m/s
Now determine how many seconds the ball had to travel to reach 57 meters.
T = 57 m / 15.62969052 m/s = 3.647 s
height of the ball at time T is
d = vT - 0.5AT^2
where
v = initial velocity
T = Time
A = acceleration due to gravity (9.8m/s^2)
Plug in the known values
d = (15.35842773 m/s)(3.647 s) - 0.5 9.8 m/s^2 (3.647 s)^2
d = 56.01219 m - 4.9 m/s^2 (13.30061s^2)
d = 56.01219 m - 65.17298 m
d = -9.1608 m
So the ball fell a total of 9.16 meters, which means that the building was 9.16 meters tall.</span>
