A radiometer has two square vanes (1.0 cm by 1.0 cm), attached to a light horizontal cross arm, and pivoted about a vertical axis through the center, as shown in the figure. The center of each vane is 6.0 cm from the axis.
One vane is silvered and it reflects all radiant energy incident upon it. The other vane is blackened and it absorbs all incident radiant energy. An electromagnetic wave with an intensity of 0.30 kW/m2 is incident normally upon the vanes. What is the radiation pressure on the blackened vane? (c = 3.00 108 m/s,
0 = 4 10-7 T m/A, 0 = 8.85 10-12 C2/N m2)
A) 1.0 10-10 Pa
B) 1.0 10-9 Pa
C) 1.0 10-8 Pa
D) 1.0 10-7 Pa
E) 1.0 10-6 Pa
Question 2
A radiometer has two square vanes (1.0 cm by 1.0 cm), attached to a light horizontal cross arm, and pivoted about a vertical axis through the center, as shown in the figure.
The center of each vane is 6.0 cm from the axis. One vane is silvered and it reflects all radiant energy incident upon it. The other vane is blackened and it absorbs all incident radiant energy. An electromagnetic wave with an intensity of 0.30 kW/m2 is incident normally upon the vanes. What is the torque due to radiation pressure on the vane assembly about the vertical axis?
(c = 3.00 108 m/s, 0 = 4 10-7 T m/A, 0 = 8.85 10-12 C2/N m2)
A) 2.4 10-12 N m
B) 6.0 10-12 N m
C) 1.2 10-11 N m
D) 1.8 10-11 N m
E) 2.4 10-11 N m
Vertical and Horizontal Changes in Pressure
Stretch shoulder in horizontal flexion by grasping at the forearm and reaching the entire arm across ...
Apply circular friction with the heels of the hands to tendons that cross the knee. Place heels of ...
The monohybrid cross between tall and dwarf pea plants
Cross-section of the spinal cord
Cross-regulatory interactions among gap genes