show your work in the spaces provided! 50 % 1. Then, Circle the Letter that corr
ID: 1770286 • Letter: S
Question
show your work in the spaces provided! 50 % 1. Then, Circle the Letter that corresponds to the correct answeri 50% INSTRUCTOy I. A 3-kg block of wood is floating in water. What is the magnitude of the buoyant force acting on the block? A. 2.9N B. 9.8 N C. 29.8 N D. 30N E. ON 2. A manufacturer orders 100 kg of some metal ingots. What volume does the metal occupy? Take the mass density of the metal to be 89.3 kg m- B. 8.9 m3. C. 1.12 m2 . 0.11 m2. E. 10.7 m2. 3. How much heat must be transferred to each kilogram of aluminum to bring it to its melting point of 660 c. from a temperature of 24 °C ? The specific heat capacity for aluminum is 890 J/kg. c. E. C. 5.66 x1oY D. 5.66 × 104 J 5.66 × 10 A. 5.66J B. 566J , Ethyl alcohol boils at 78 ·The Fahrenheit equivalent of this temperature is D. 78 °F E. 32°F A. 351 B. 1729F C. 140oF musectional area is 1.5 m2. The preExplanation / Answer
1. The correct option is C. 29.4 N.
The block is floating. So, the buoyant force will be equal to the weight of the block. So, Force
F = mass * acceleration due to gravity = 3 x 9.8 N = 29.4 N.
2. The correct option is C. 1.12 m3.
The volume V = Total mass / density = 100/89.3 = 1.12 m3.
3. The correct option is E. 5.66x10^5 J.
Heat required by each kg of Al will be H = C (T) = 890 (660-24) = 5.66x10^5 J
4. The correct option is B. 172 F.
F = 9C/5+32 = 172 F
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