One situation in which the law of conservation of energy is violated is
A) near black holes.
B) for very fast-moving objects.
C) for atomic-sized objects.
D) All of the above.
E) nonsense--no violations of this law have ever been observed.
E
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The Cassini space probes used electricity provided by __________
Fill in the blank(s) with correct word
A 44.0-g block of ice at -15.0°C is dropped into a calorimeter (of negligible heat capacity) containing 100g of water at 5.0°C
When equilibrium is reached, how much of the ice will have melted? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 2.1 g B) 21 g C) 5.2 g D) 52 g E) 4.4 g
A solenoid consists of 100 circular turns of copper wire. Parts of three turns, A, B and C, are shown below
When a current flows through the coil,
a.
both A and C are repelled by B.
b.
A is attracted to B; C is repelled by B.
c.
neither A nor C is attracted to or repelled by B.
d.
A is repelled by B; C is attracted to B.
e.
both A and C are attracted to B.
A transverse periodic wave is represented by the equation z(y, t) = 1.50 cm sin(1,250 rad/s t + 10.0
What is the velocity of the wave?
A. 125 m/s in the + z direction B. 250 m/s in the - z direction C. 125 m/s in the + y direction D. 125 m/s in the - y direction E. 250 m/s in the - y direction