1. The coefficient of performance of a fridge is 2. It receives heat from cold chamber in each cycle. What amount of heat does the fridge ejects in hot chamber in each cycle? 250 J
A. 500 JB. 125 JC. 252 JD. 375 J Q2 Q1−Q2 = 2 ⇒ 250 Q1−250 = 2 ⇒ Q1 = 375J
2. My instructor insisted _____ the fundamental concepts before moving on to advanced topics.
A. in my understandingB. in me learningC. on my masteringD. on me knowing
3. lim x→∞ (1 + 1 3x )2x =?
A. e 2 3B. e 3 2C. e 1 3D. e2 lim x→∞ (1 + 1 3x )2x = lim x→∞ [(1 + 1 3x )3x] 2 3 = e 2 3
4. Ten years ____ a long time to wait.
A. have beenB. areC. isD. were
5. If the mass of the Earth is M and the radius is R, the ratio of g/G on the surface of the Earth will be-
A. R2 MB. M R2C. R2D. M R g = GM R2 ⇒ g G = M R2
6. Meso isomer is possible for which of the following compounds?
A. CH3 − CHBr − CHBr − CH3B. CH2OH − CHBr − CH2OHC. CH3 − CHBr − CHOH − CH3D. CH3 − CHBr − CHBr − CH2OH