How much heat is required to increase the temperature of 1.70 moles of an ideal monatomic gas by 23.0 K at constant pressure?
A) 812 J
B) 346 J
C) 751 J
D) 391 J
E) 290 J
A
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The absence of oxygen on Mars means that it has very little
a. carbon dioxide. b. methane. c. ozone. d. helium.
A toy rocket is launched vertically from ground level at time t = 0 s. The rocket engine provides constant upward acceleration during the burn phase
At the instant of engine burnout, the rocket has risen to 49.0 m and acquired an upward velocity of 60.0m/s The rocket continues to rise with insignificant air resistance in unpowered flight, reaches maximum height, and falls back to the ground. The maximum height reached by the rocket is closest to A) 221 m. B) 209 m. C) 244 m. D) 233 m. E) 256 m.
A tow truck exerts a force of 3000 N on a car, which then accelerates at 2 m/s2. What is the mass of the car?
A) 500 kg B) 1000 kg C) 1500 kg D) 3000 kg E) none of these
A composite material has a matrix of epoxy with an elastic modulus of 5 GPa and a reinforcement of E-glass fibers with an elastic modulus of 72.4 GPa. Use a computer program to calculate the elastic modulus in both the axial and transverse directions as a function of volume fraction of fibers. Use increments of 0.1 volume fraction and terminate the calculations at a fiber volume fraction of 0.8.
What will be an ideal response?