Newton's 2nd Law of Motion states that
A) action and reaction are equal and opposite
B) force equals mass times acceleration
C) an object moves at a constant velocity unless a force acts
D) the force of gravity decreases with increasing distance
B
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A substance is taken through the illustrated cycle in Fig. 12-3 from (p1,v1 ) to (3p1,2v1 ) to (p1,2v1 ) back to (p1, v1). How much work was done?
A) p1v1 B) 2p1v1 C) 4p1v1 D) 5p1v1 E) 3p1v1
Buoyancy: A waiter fills your water glass with ice water (containing many ice cubes) such that the liquid water is perfectly level with the rim of the glass. As the ice melts,
A. the liquid-water level remains flush with the rim of the glass. B. the liquid water level rises, causing water to run down the outside of the glass. C. the liquid-water level decreases.
Dust particles are pulverized rock, which has density 2500 kg/m3. They are approximately spheres 20 ?m in diameter
Treating dust as an ideal gas, what is the root-mean-square speed (thermal speed) of a dust particle at (The Boltzmann constant is 1.38 × 10-23 J/K.) A) 5.2 × 10-5 m/s B) 1.7 × 10-5 m/s C) 3.0 × 10-5 m/s D) 7.3 × 10-5 m/s
An ideal solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. If this solenoid carries a current of 12 A, what is the magnitude of the magnetic field at the center of the solenoid? (?0 = 4? × 10-7 T ? m/
A) A) 16 mT B) 4.9 mT C) 15 mT D) 6.0 mT E) 9.0 mT