Wien's Law: If the surface of our bodies is at 37°C, at what wavelength does the radiation that we emit peak if we behave like a blackbody? The constant in Wien's law is 0.0029 m ? K.
Fill in the blank(s) with the appropriate word(s).
9.4 ?m
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Radioactivity Basics: The nuclei of 
He are also known as
A. ? particles. B. ? particles. C. ? rays. D. x-rays. E. positrons.
When using the equation that relates linear speed and rotational velocity (v = r?) what are acceptable units for the rotational velocity (?) ?
A. degrees/s B. Radians/min C. Rev/min (rpm)
A car needs to generate 75.0 hp in order to maintain a constant velocity of 27.3 m/s on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
A) 2.05 × 103 N B) 2.75 N C) 1.03 × 103 N D) 2.87 × 103 N
A crying baby emits sound with an intensity of 8.0 × 10-8 W/m2
Calculate a reasonable estimate for the intensity level from a set of quintuplets (five babies), all crying simultaneously at the same place? The lowest detectable intensity is 1.0 × 10-12 W/m2. A) 79 dB B) 69 dB C) 56 dB D) 49 dB E) 36 dB