Pressure is measured in a 1.1 cm radius water hose at a height of 1.5 m above the floor of a house and compared to that in a hose connected to the first (of radius 2.2 cm). If the pressure in the larger radius hose is the same as that in the smaller radius hose, how far above the floor is the location for this pressure measurement?
A. 0.23 N
B. 8.1 N
C. 0.81 N
D. 2.3 N
A. 0.23 N
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The unit of magnetic flux is the weber. 1 Wb equals
A. 1 V·m.
B. 1 V·s/A.
C. 
D. 
An astronomical telescope is made with lenses of focal length 80.0 cm and 2.00 cm. Two stars in the sky are separated by 
What angle of separation do they have when viewed in the telescope?
A. 
B. 
C. 
D. 
E. 
Which carbonate mineral reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?
What will be an ideal response?
A 7 cm diameter heat exchanger rod at 400ºC is surrounded by a 15 cm diameter heat shield. If the surroundings are a black body at 20ºC, determine the equilibrium temperature of the shield if (a) both rod and shield are black bodies, (b) emissivity of both is 0.7, and (c) the rod is a black body and the shield has emissivity of 0.7.
