When light passes through a prism the color refracted most is
A) green.
B) red.
C) violet.
D) blue.
E) yellow.
C
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The stress that occurs when material is pulled apart is called
A) compressional stress. B) tensional stress. C) shear stress. D) simple stress.
In a laboratory accident a work area is contaminated with radioactive material. Health physicists monitor the area during a 30-day period and, after correcting for the background rate, obtain the data shown in the table
Time (days) 0 2 6 11 19 30 Counts/min 1000 899 727 557 364 202 The accident occurred at t = 0. They determine that it will not be safe for workers to enter the area until the radioactivity level has dropped to 133 counts per minute. Of the choices listed below, which one is the earliest time that workers could safely return? A) 38 days B) 44 days C) 50 days D) 32 days E) 24 days
A syringe has an inside radius of its barrel of 0.50 cm and at the opening at the end of the needle the radius is 1.0 mm. If a force F is applied to the plunger, what is the force produced at the opening of the needle?
a. 5F b. 25F c. F/5 d. F/25
Consider a beam of free particles that each have a certain (nonrelativistic) kinetic energy K. If we double this kinetic energy, what happens to the beam’s wavelength?
A. It increases by a factor of 2. B. It increases by a factor of 21/2. C. It remains the same. D. It decreases by a factor of 21/2. E. It decreases by a factor of 2.