A block of ice at 0.000°C is added to a well-insulated 147-g aluminum calorimeter cup that holds 200 g of water at 10.0°C
The water and aluminum cup are in thermal equilibrium, and the specific heat of aluminum is 910 J/(kg?K). If all but 2.00 g of ice melt, what was the original mass of the block of ice? The specific heat of water is 4190 J/(kg?K), its latent heat of fusion is 334 kJ/kg, and its latent heat of vaporization is 2260 kJ/kg.
A) 31.1 g
B) 35.6 g
C) 38.8 g
D) 42.0 g
E) 47.6 g
A
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A uniform solid sphere has a moment of inertia I about an axis tangent to its surface. What is the moment of inertia of this sphere about an axis through its center?
A) 1/7 I B) 2/7 I C) 2/5 I D) 3/5 I E) 7/5 I
An extremely light rod 1.00 m long has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other
The system rotates at a constant angular speed about a fixed axis perpendicular to the rod that passes through the rod 30.0 cm from the end with the 3.00-kg mass attached. The kinetic energy of the system is measured to be 100.0 J. (a) What is the moment of inertia of this system about the fixed axis? (b) What is the angular speed (in revolutions per second) of this system? What will be an ideal response?
Momentum is defined as
A) mass times speed. B) mass times velocity. C) force times velocity. D) mass times acceleration. E) force times acceleration.
What is the de Broglie wavelength of an electron traveling 100 m/s?