Examlex
An 800-kHz radio signal is detected at a point 2.7 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 0.36 V/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. What is the intensity of the radio signal at that point? (c = 3.00 × 108 m/s, μ0 = 4π × 10-7 T ∙ m/A, ε0 = 8.85 × 10-12 C2/N ∙ m2)
Global Food Production
The worldwide process of growing, processing, and distributing foodstuffs to meet the demand of populations across the globe.
Increased Yields
The result of agricultural practices that lead to a higher output of crops per area of cultivation.
Environmental Health
The branch of public health concerned with how environmental factors affect human health and quality of life.
Q3: Light from a monochromatic source shines through
Q11: The correct ground state electron configuration of
Q15: A series ac circuit consists of an
Q33: An ac source of period T and
Q33: If the electric flux through a closed
Q34: A double-convex thin lens is made of
Q40: Electric charge is uniformly distributed inside a
Q41: Two capacitors of capacitance 6.00 μF and
Q46: A 4.0-cm tall object is placed 50.0
Q77: The left-hand end of a glass rod