The specific of ice is 2.10 kJ/kg 
the heat of fusion for ice at 0
is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg
and the heat of vaporization of water at 100
is 2,256 kJ/kg. What is the final equilibrium temperature when 10.0 grams of ice at -15
is mixed with 40.0 grams of water at 
?
A. 59.5
B. 57.2
C. 53.6
D. 48.9
E. 42.6
E. 42.6
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The y component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. What is the wavelength of this electromagnetic wave? (c = 3.0 × 108 m/s)
A) 0.272 µm B) 1.36 µm C) 2.72 µm D) 8.57 µm E) 17.1 µm
A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s
(a) What are the magnitude and direction of the acceleration of the ball? (b) Find the tension force that the string exerts on the ball.
High-temperature superconductors are made of
A. ceramics with copper, yttrium, barium, and oxygen. B. noble gases like helium layered with highly reactive gases like hydrogen. C. 99.999% pure copper. D. metallic hydrogen.
An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an orbital momentum equal to zero
What is the magnitude of the orbital angular momentum L of the atom? A) 1.4? B) 2.0? C) 1.7? D) 1.0? E) 1.2?