Air pollution results from ______________ combustion of ______________ fuels
Fill in the blank(s) with correct word
incomplete; impure
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Projectile Motion: A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
A. 80 m/s2 B. 40 m/s2 C. 9.8 m/s2 D. 0 m/s2 E. 69 m/s2
A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a thermal conductivity of 1.3 W/(m ? K), separates a basement at 18°C from the ground outside at 6°C. Under steady state conditions, how much heat flows through the wall in one hour?
A) 1.8 MJ B) 1.8 kJ C) 500 J D) 5.0 MJ E) 5.0 kJ
The source of all waves is
A) something that vibrates. B) energy. C) a force of some kind. D) all of the above E) none of the above
A 5.0-N projectile leaves the ground with a kinetic energy of 220 J. At the highest point in its trajectory, its kinetic energy is 120 J. To what vertical height, relative to its launch point, did it rise if there was no air resistance?
A) 44 m B) 24 m C) 20 m D) 10 m E) It is impossible to determine the height without knowing the angle of launch.