When calculating the rate of a disease, which of the following is generally the denominator of the calculation?
a. Population infected
b. Population at risk
c. Total state population
d. Total world population
Answer: b. Population at risk
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The moment of inertia of a uniform rod (about its center) is given by I = ML2/12. What is the kinetic energy of a 120-cm rod with a mass of 450 g rotating about its center at 3.60 rad/s?
A) 0.350 J B) 4.20 J C) 0.700 J D) 0.960 J E) 2.10 J
A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining 4 times the speed received in the situation described here?
a. 2.00d b. 0.50d c. 4.00d d. 16.00d
Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more. Which of the following is not true?
a. The index of refraction for color 2 is greater than that for color 1. b. The two colors of light have different frequencies associated with them. c. The speed of light for color 2 is greater than that for color 1 in this prism. d. The wavelength for color 1 is different than that for color 2 in this prism.
A(n) ______________ is a tested explanation of a broad segment of basic natural phenomena
Fill in the blank(s) with correct word