Answer:
0.09221 V/m
Explanation:
= Vacuum permeability = 
P = Power of transmitter = 250 mW
r = Distance to source = 42 m
c = Speed of light = 
= Electric field amplitude
Intensity of a wave is given by
Intensity is also given by
The electric field amplitude at the receiver when it first fails is 0.09221 V/m
Answer:
Gate control theory of pain
Explanation:
The gate control theory of pain sates that non-painful input closes the nerve gates to painful input, which prevents pain sensation from traveling to the central nervous system (brain).
Therefore, the idea that large fibers in the sensory nerves can prevent impulses from reaching the brain and thus prevent the sensation of pain is part of the gate control theory of pain.
38*10=380 N
To be more exact, 38 should be multiplied by 9.8 instead of 10.
Answer: True
Explanation:
It should be noted that when refrigerant is added in vapor form to the operating refrigeration system, then the addition of the refrigerant should be to the low-pressure side of the refrigeration system.
Furthermore, when system pressures are lower than the pressure in the refrigerant tank as stated in the question, then the refrigerant can be added to both the high and low pressure sides of the system.
Therefore, the correct option is true.
Joules
Watts
Kilocalories
BTU
Electron volt
I can't remember any others. Hope that's enough : )
