Of all the forms of electromagnetic radiation, the one with the lowest frequency is
A) gamma rays.
B) ultraviolet rays.
C) visible light.
D) microwaves.
E) radio waves.
E
You might also like to view...
Multiple-Object Accelerating Systems: Two boxes are connected to each other by a string as shown in the figure. The 10-N box slides without friction on the horizontal table surface. The pulley is ideal and the string has negligible mass. What is true about the tension T in the string?
A. T = 10 N B. T = 20 N C. T = 30 N D. T < 30 N E. T > 30 N
Energy Conservation With Nonconservative Forces: On a planet where g = 10.0 m/s2 and air resistance is negligible, a sled is at rest on a rough inclined hill rising at 30° as shown in the figure. The object is allowed to move and it stops on a rough horizontal surface, at a distance of 4.0 m from the bottom of the hill. The coefficient of kinetic friction on the hill is 0.40. What is the coefficient of kinetic friction between the horizontal surface and the sled?
A. 0.10 B. 0.20 C. 0.31 D. 0.40 E. 0.60
Flux: A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are at an angle of 30°.
A. 0 T ? m2 B. 3.1 × 10-3 T ? m2 C. 5.5 × 10-3 T ? m2 D. 6.3 × 10-3 T ? m2
A brass bar (E 5 110 MPa) of length L 5 2.5 m has diameter d1 5 18 mm over one-half of its length and diameter d2 5 18 mm over the other half. Compare this nonprismatic bar to a prismatic bar of the same volume of material with constant diameter d and length L. The elongation of the prismatic bar under the same load P 5 25 kN is approximately:
(A) 3 mm
(B) 4 mm
(C) 5 mm
(D) 6 mm
