All of the following are vectors, except
A) mass.
B) acceleration.
C) displacement.
D) velocity.
E) force.
A
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Conduction: A heat-conducting rod, 0.90 m long and wrapped in insulation, is made of an aluminum section that is 0.20 m long and a copper section that is 0.70 m long. Both sections have a cross-sectional area of 0.00040 m2. The aluminum end and the copper end are maintained at temperatures of 30°C and 230°C, respectively. The thermal conductivities of aluminum and copper are 205 W/m ? K (aluminum) and 385 W/m ? K (copper). What is the temperature of the aluminum-copper junction in the rod with steady state heat flow?
A. 100°C B. 93°C C. 86°C D. 80°C E. 74°C
At what altitude should a satellite be placed into circular orbit so that its orbital period is 48.0 hours? The mass of the earth is 5.976 × 1024 kg and the radius of the earth is 6.378 × 106 m
A) 4.22 × 107 m B) 7.58 × 107 m C) 8.22 × 107 m D) 6.07 × 107 m E) 6.71 × 107 m
The value of g at the surface of spherical Asteroid X is 0.00600 m/s2, and the escape speed is 9.95 m/s. What is the radius of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 8250 m B) 16,000 m C) 1600 m D) 800 m E) 400 m
The specific heat capacity of copper is three times the specific heat capacity of lead. Equal masses of copper and lead are heated from room temperature to the temperature of boiling water. To achieve this, the amount of heat added to the copper is 3 times the amount of heat added to the lead
a. True b. False Indicate whether the statement is true or false