Write out the number 9.45 × 10-5 in full with a decimal point and correct number of zeros
A)
0.00000945
B)
0.0000945
C)
0.000945
D)
0.00945
E)
0.0945
B
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_________ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space
a. Infrared radiation b. Ultraviolet radiation c. Radio wave radiation d. X-ray radiation e. Visible light
The sum of two vectors has the greatest magnitude when the angle between these two vectors is
What will be an ideal response?
The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by 
in SI units. What is the maximum E field?
A. 1000 V/m B. 180 V/m C. 81 V/m D. 360 V/m E. 0.40 V/m
Two identical ladders are 3.0 m long and weigh 600 N each. They are connected by a hinge at the top and are held together by a horizontal rope, 1.0 m above the smooth floor forming a symmetric "A" arrangement
The angle between the ladders is 60° and both ladders have their center of gravity at their midpoint. What is the tension in the rope? A) 240 N B) 300 N C) 220 N D) 260 N E) 280 N