Significant Figures: A rectangular garden measures 15 m long and 13.70 m wide. What is the length of a diagonal from one corner of the garden to the other?
A. 18 m
B. 19 m
C. 20 m
D. 4.1 × 102 m
Answer: C
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A heat conducting rod, 1.40 m long, is made of an aluminum section that is 0.50 m long and a copper section that is long. Both sections have cross-sectional areas of
The aluminum end and the copper end are maintained at temperatures of and respectively. The thermal conductivity of aluminum is 205 W/m ? K of copper is 385 W/m ? K. The rate at which heat is conducted in the rod is closest to A) 20 W. B) 18 W. C) 23 W. D) 25 W. E) 28 W.
Calculate the centripetal acceleration for each of the two trials
Ralph walks 3 m to the left in 2 seconds, then 4 m to the right in 3 seconds. Next, he stops for 3 seconds, and finally walks 5 m to the left in 4 seconds
Ralph's final position is closest to:
1.0 m 2.2 m 3.4 m 4.6 m 5.8 m 6.10 m 7.12 m 8.14 m 9.The negative of one of the choices above 10.Impossible to determineFluid Flow: Water flows through a horizontal pipe of cross-sectional area 10.0 cm2 at a pressure of 0.250 atm with a flow rate is 1.00 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm2. What is the pressure at the valve? The density of water is 1000 kg/m3, and treat it as an ideal incompressible fluid.
A. 0.110 atm B. 0.235 atm C. 0.200 atm D. 0.157 atm E. 7700 Pa