1. A 3-kg block of wood is floating in water.What is the magnitude of the buoyan
ID: 1782780 • Letter: 1
Question
1. A 3-kg block of wood is floating in water.What is the magnitude of the buoyant force acting on the block? A.2.9 N B, 9.8 N 30N C.29.8 N E.ON -3.DKg9.91hog-a9.SN 0 m 2. A manufacturer onders 100 kg of some metal ingots. What volume does the metal occupy? Take the mass density of the metal to be 89.3 kgm- A. 9 m C. 1.12 m2 0.11m.E 10.7m2 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 890J/kg. oC. 3. A. 5.66J B. 566J C. 566 x1oY D. 5.66 ×104 J E. 5.66 × 105 J Ethyl alcohol boils at 78 °C. The Fahrenheit equivalent of this temperature is D. 78 °F 4. 172 140 E. 32°F A. 351 C. c78 . A2-kg piston rests on a sample of a gas in a cylinder whose cross-sectional area is 1.5 m2. The pres the piston exerts on the gas is A. 13 Pa B. 1.3 Pa C. 130 Pa D. 30 Pa E. 0.13 PExplanation / Answer
a) Fb = 3(9.8) = 30 N appprx
b)volume= mass / density = 100/ 89.3=1.12 m^3
c)Q = 1 kg (890 ) ( 660-24) = 5.66 x 10^5 J
d) 172 F
e)pressure - force. area = 2x 9.8/ 1.5=13 Pa
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