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yawa3891 [41]
3 years ago
10

Brainliest for the first person to answer Which is a characteristic of an electromagnetic wave?

Physics
1 answer:
KiRa [710]3 years ago
5 0
The first one. The E and B chatacteristic are perpendicular to eachother. The direction of the wave can be found by the right hand rule.
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A soccer player icks a rock horizontally off a 40m high cliff into a pool f water if the player hears the sound of the splash s
Semenov [28]

Answer:

v = 9.936 m/s

Explanation:

given,

height of cliff = 40 m

speed of sound = 343 m/s

assuming that time to reach the sound to the player = 3 s

now,

time taken to fall of ball

t = \sqrt{\dfrac{2s}{g}}

t = \sqrt{\dfrac{2\times 40}{9.8}}

t = 2.857 s

distance

d = v  x t

d = v x 2.875

time traveled by the sound before reaching the player

t_0 = t - t_{fall}

t_0 = 3 - 2.875

t_0 = 0.143 s

distance traveled by the wave in this time'

r = 0.143 x 343

r= 49.05 m

now,

we know.

d² + h² = r²

d² + 40² = 49.05²

d =28.387 m

v x 2.875=28.387 m

v = 9.936 m/s

7 0
3 years ago
How much current does it take to paralyze your muscles?​
satela [25.4K]

Answer: Current needed, mA 20 Voltage needed, V AC 6

Explanation: An electric gradient (or field) can exist that is analogous to the situation described above for step and touch potentials. The situation is more complex to analyze in the water because a person in the water assumes different postures and orientations in 3 dimensions (up, down, and sideways—north, south, east, and west). The transthoracic and translimb voltages will vary as the person moves in relation to the orientation (direction) of the electric field.

6 0
3 years ago
Thermal conductivity is dependent on the _____.
VladimirAG [237]
I believe the answer is convection! 
6 0
3 years ago
Which statements describe a situation in which work is being done? Check all that apply.
Sphinxa [80]

Answer: A, D, E

Explanation:

just did it :))

4 0
3 years ago
Read 2 more answers
which of the following does not represent a significant negative environmental impact of using nuclear fuel
Brrunno [24]

Nuclear energy has practically no harmful emission (unless you consider water vapour to be bad).

3 0
3 years ago
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