An automobile engine operates with an overall efficiency of 12%. How much energy is delivered as waste heat (in gallons of gasoline) for each 10 gallons of fuel burned?
a. 1.2
b. 8.8
c. 6.5
d. 4.7
e. 7.5
b
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Convert 14°F to K
A) 263 K B) 287 K C) 163 K D) -10 K E) 474 K
A toy rocket, weighing 10. N, blasts off from ground level. At the exact top of its trajectory, its energy is 140. J. To what vertical height does it rise?
A) 1.4 m B) 14. m C) 12. m D) 0.12 km E) 1.4 km
A circular loop of wire of radius 10 cm carries a current of 6.0 A. What is the magnitude of the magnetic field at the center of the loop? (?0 = 4? × 10-7 T ? m/
A) A) 3.8 × 10-5 T B) 3.8 × 10-7 T C) 1.2 × 10-5 T D) 1.2 × 10-7 T E) 3.8 × 10-8 T
Allowing water to cascade or bubble in a fountain during the purification process is an example of
A) a gas dissolving in a liquid. B) a chemical reaction. C) ion exchange. D) a solid dissolving in a liquid. E) only a and b