Four things that the resistance of a conducting material depends on are __________, __________, __________ and ___________
Fill in the blank(s) with correct word
composition, length, diameter, temperature
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The main criterion for deciding between Universe geometries is ____
a. density b. mass c. temperature d. age e. inflation
Young's Modulus: A 1200-kg car is being raised at a constant speed if 25 cm/s by a crane, using a 20-m long steel cable that is 1.5 cm in diameter. Young's modulus for steel is 2.0 × 1011 Pa. What is the change in length of the cable caused by the car?
A. 6.7 mm B. 6.7 cm C. 3.3 mm D. 3.3 cm E. 3.3 m
Magnetic Field of a Long Wire: The magnetic field at a distance of 2 cm from a long straight current-carrying wire is 4 ?T. What is the magnetic field at a distance of 1 cm from this wire?
A. 2 ?T B. 4 ?T C. 6 ?T D. 8 ?T E. 10 ?T
What motivated Arrhenius to calculate how changes in carbon dioxide might affect the climate?
A. He was seeking to understand the consequences of burning fossil fuels. B. He knew that the carbon dioxide concentration was increasing and sought to understand how that would affect the climate. C. He was seeking to understand why the world was rapidly warming up. D. He was seeking to understand the causes of ice ages.