An electromagnetic wave has a peak electric field of 3.0 kV/m. What is the intensity of the wave? (c = 3.0 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2)
A) 24 kW/m2
B) 12 kW/m2
C) 8.0 kW/m2
D) 4.0 kW/m2
Answer: B
You might also like to view...
As the moon circles Earth, the net force on it is
A) backward. B) directed outward away from Earth. C) directed inward toward Earth. D) forward. E) zero.
Use a spreadsheet or write a short computer program to confirm the percent ionic and covalent character of the bonding in Table 2.3.
What will be an ideal response?
According to the Bohr theory, the probability of finding a hydrogen atom's ground-state electron 0.053 nm from the proton is
a. low, but not zero. b. 100%. c. zero. d. high, but not 100%.
A straight wire carries a current of 10 A at an angle of 30° with respect to the direction of a uniform 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire
A) 0.75 N B) 1.5 N C) 3.0 N D) 6.0 N