A syringe has an inside radius of its barrel of 0.50 cm and at the opening at the end of the needle the radius is 1.0 mm. If a force F is applied to the plunger, what is the force produced at the opening of the needle?

a. 5F
c. F/5
b. 25F
d. F/25


D

Physics & Space Science

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Relative Velocity: A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. How fast can she swim in still water?

A. 0.50 m/s B. 0.80 m/s C. 1.2 m/s D. 1.4 m/s E. 1.8 m/s

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Photon Momentum: What is the wavelength of a photon having the same momentum as an electron that is traveling at 7.5 km/s? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg)

Fill in the blank(s) with the appropriate word(s).

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You can create an avatar for use in multiple websites, social media sites, and apps.

Answer the following statement true (T) or false (F)

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Passing arsenic contaminated water through a long pipe filled with sand and iron powder leads to removal of the arsenic by

A) a physical change. B) an oxidation-reduction reaction. C) ion exchange. D) filtering out the suspended arsenic particles. E) only a and b

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