Doubling the current, number of turns, the area, and the ambient magnetic field for a coil changes the maximum torque it experiences by what factor?
A. 2
B. 4
C. 8
D. 16
E. 32
D. 16
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The energy levels for electrons vary from one element to another
Indicate whether the statement is true or false
If 3.0 × 1015 electrons flow through a section of a wire of diameter 2.0 mm in 4.0 s, what is the current in the wire? (e = 1.60 × 10-19 C)
A) 0.12 mA B) 0.24 mA C) 7.5 × 107 A D) 7.5 × 1014 A
If you focused a store-bought telescope at a tree down the street on a clear day, the tree would be viewed as ______________ and _____________
a. right side up, larger b. upside down, larger c. right side up, smaller d. upside down, smaller
Estimate the volume of a helium-filled balloon if it is to lift a payload of 1000 kg. The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3
a. 4410 m3 c. 450 m3 b. 900 m3 d. 225 m3