Two long parallel wires that are 0.30 m apart carry currents of 5.0 A and 8.0 A in the opposite direction.
Find the magnitude of the force per unit length that each wire exerts on the other wire and indicate if the force is attractive or repulsive. (0 = 4 10-7 T m/A)
A) 7.2 10-5 N attractive
B) 2.7 10-5 N repulsive
C) 3.4 10-5 N attractive
D) 2.7 10-5 N attractive
E) 7.2 10-5 N repulsive
Question 2
The following items are positioned in sequence: A source of a beam of natural light of intensity I0, three ideal polarizers A, B, and C; and an observer.
Polarizer axis angles are measured clockwise from the vertical, as viewed by the observer. The axis angle of polarizer A is set at 0 (vertical), and the axis angle of polarizer C is set at 50. The axis angle of polarizer B is set at 120. What is ratio of the intensity of the beam at the observer to the intensity I0 of the source?
A) 0.015
B) 0.020
C) 0.025
D) 0.030
E) 0.035
long bone
The Long Valley Caldera Erupted the Bishop Ash 760,000 Years Ago
Cut view of long bone.
Long-Range Forecasts
Human activity has released carbon from sequestration in long-term reservoirs
Composition of a long bone