A contact lens is made of plastic with an index of refraction of 1.50. The lens has an outer radius of curvature of +2.0 cm and an inner radius of curvature of +2.5 cm. What are the focal length and the power of the lens?
What will be an ideal response?
+20 cm, +5.0 diopters
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Which of the following processes would be the most likely process for making continuous-fiber composite material for a high-pressure natural gas tank?
(a) Resin transfer molding (b) Vacuum bagging (c) Pultrusion (d) Filament winding
First Law of Thermodynamics: A 40.0-L container is divided into two equal parts by a rubber membrane. One half of the container has 1.50 moles of an ideal monatomic gas at 250 K, and the other half is a vacuum. The container is well insulated, so there is no exchange of heat with the surroundings. The membrane breaks, and eventually the gas reaches a new equilibrium condition occupying the entire volume. What is the final temperature of the gas?
A. 100 K B. 125 K C. 157 K D. 180 K E. 250 K
By substituting for Eb? (T) performing the integration over the entire spectrum, derive a relationship between ? and the constants C1 and C2
GIVEN
where
FIND
• A relationship between ? and C1 and C2
A 0.24 kg blob of clay is thrown at a wall with an initial horizontal velocity of 16 m/s. If the clay comes to a stop in 91 ms, what is the average horizontal force on the clay due to the wall?
A) 26 N B) 51 N C) 35 N D) 42 N