A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 300 m. How fast can she swim in still water?
A) 1.24 m/s
B) 1.83 m/s
C) 0.50 m/s
D) 1.42 m/s
E) 0.25 m/s
C
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Two point charges are placed along a horizontal axis with the following values and positions: +3.0 µC at x = 0 cm and -6.0 µC at x = 20 cm. At what point along the x axis is the electric field zero?
a. 8.0 cm c. -38 cm b. -48 cm d. -69 cm
It is quantization of electron angular momentum that is the heart of the Bohr Model
What will be an ideal response?
The element first found in the Sun's spectrum, then on Earth 30 years later, is:
A) hydrogen. B) helium. C) solarium. D) technetium. E) aluminum.
A 0.150-kg air track cart is attached to an ideal spring with a force constant (spring constant) of 3.58 N/m and undergoes simple harmonic oscillations. What is the period of the oscillations?
A) 2.57 s B) 0.527 s C) 0.263 s D) 1.14 s E) 1.29 s