Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. The magnitude of the surface charge density on either of the facing surfaces is 2.0 nC/m2 . Determine the magnitude of the electric potential difference between the plates
a. 36 V
b. 27 V
c. 18 V
d. 45 V
e. 16 V
c
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A mass src="https://sciemce.com/media/4/354096dfc31fe48a34.png" class="w-image" />?
is connected by a light string that passes over a pulley of mass M to a mass 
sliding on a frictionless incline as shown in the figure. There is no slippage between the string and the pulley. The pulley has a radius of 30.0 cm and a moment of inertia of 
If 
is 4.00 kg, 
is 4.00 kg, M is 4.00 kg, and the angle is 70.0 degrees, then what is the acceleration of
A. 3.10 
B. 2.89
C. 2.43
D. 2.15
E. 1.49
An isolated object is initially spinning at a constant speed. Then, although no external forces act upon it, its rotational speed increases. This must be due to
A. a decrease in the moment of inertia. B. an increase in the mass. C. an increase in the moment of inertia. D. an increase in the angular momentum. E. impossible, angular momentum conservation is violated.
A planar cross section through two spherical waves emanating from the sources S1 and S2 in the plane is shown in the figure. The black circles are one and two wavelengths from their respective sources. The lighter circles are one half and one and a half wavelengths distant from their respective sources. If the phase at S1 and S2 is zero at this instant, and the waves shown arriving at P1 both arrive with amplitude A, the magnitude of the phase angle of each wave at point P1 (in radians) is
A. 0. B. ?. C. 2?. D. 3?. E. ?/2.
The Schwarzschild radius of a black hole is about 3 km per solar mass; it is amazingly linear over a wide range of masses
Indicate whether the statement is true or false