A long straight metal rod has a radius of 2.0 mm and a surface charge of density 0.40 nC/m2 . Determine the magnitude of the electric field 3.0 mm from the axis
a. 18 N/C
b. 23 N/C
c. 30 N/C
d. 15 N/C
e. 60 N/C
c
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How do we know that pulsars must be very small in size (radius)?
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A battery is rated at 12. V and 160. A ? h. How much charge does the battery store?
What will be an ideal response?
What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1 000 m? (The pressure inside the bathysphere is, hopefully, 1 ATM.) r(sea water) = 1.02 × 10^3 kg/m3
a. 1.26 × 10^4 N b. 1.26 × 10^6 N c. 1.26 × 10^8 N d. 1.26 × 10^10 N e. 1.26 × 10^2 N
Alcohol is less dense than water. If alcohol is used to make a barometer at normal atmospheric pressure, the height of the alcohol column would be
A) less than 10.3 m. B) 10.3 m. C) more than 10.3 m.