A rod (length = 80 cm) with a rectangular cross section (1.5 mm × 2.0 mm) has a resistance of 0.20 ?. What is the resistivity of the material used to make the rod?
a. 6.0 × 10^?7 ? / m
b. 3.8 × 10^?7 ? / m
c. 7.5 × 10^?7 ? / m
d. 3.0 × 10^?7 ? / m
e. 4.8 × 10^?7 ? / m
c
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There are three flavors of quarks
Indicate whether the statement is true or false
The charge on a particle that has quark structure uus is _____ e.
A. 0 B. 1 C. -1 D. 2/3 E. -4/3
A block of steel is found on a ship sunk in 5000 meters of water, where pressures are about 500 times that on the Earth at sea level. To know its dimensions at sea level, which relationship between stress and strain for this metal would we need to know?
1.Young's modulus 2.shear modulus 3.bulk modulus 4.none of these
When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?
A) 3.60 ? B) 1.56 ? C) 0.98 ? D) 0.30 ? E) 0.51 ?