If a = 60 cm, b = 80 cm, Q = ?6.0 nC, and q = 3.0 nC in the figure, what is the magnitude of the electric field at point P?
a.
71 N/C
b.
56 N/C
c.
60 N/C
d.
53 N/C
e.
67 N/C
d
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A spherical water droplet of 1.5-mm-diameter is freely falling in atmospheric air. Calculate the average convection heat transfer coefficient when the droplet has reached its terminal velocity. Assume that the water is at 50°C and the air is at 20°C. Neglect mass transfer and radiation.
GIVEN
• A spherical water droplet freely falling in atmospheric air
• Drop diameter (D) = 1.5 mm = 0.0015 m
• Water drop temperature (Td) = 50°C
• Air temperature (T?) = 20°C FIND
• The average heat transfer coefficient at terminal velocity ( h c)
SKETCH
The largest and deepest impact basin found on Mars is:
A) Olympus. B) Caloris. C) Hellas. D) Tharsis. E) Meridani.
A straight wire is bent into the shape shown. Determine the net magnetic force on the wire when the current I travels in the direction shown in the magnetic field 
.
A. 2IBL in the ?z direction B. 2IBL in the +z direction C. 4IBL in the +z direction D. 4IBL in the ?z direction E. zero
The angular acceleration of a wheel is given in rad/s2by 45t3 – 11t4, where t is in seconds. If the wheel starts from rest at t = 0.00 s, when is the next time the wheel is at rest?
A) 5.1 s B) 8.4 s C) 6.9 s D) 3.6 s