Two masses are connected by a cord that passes over a pulley as shown in the figure. The pulley and cord have negligible mass and (2.0 kg) moves on a horizontal surface without friction, (2.0 kg) is suspended vertically. What is the acceleration of ?





A. 3.9

B. 12

C. 6.0

D. 4.9


D. 4.9

Physics & Space Science

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A. 6.30 m/s B. 3.80 m/s C. 4.20 m/s D. 5.70 m/s

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The toy drinking bird nicely illustrates

A) evaporation. B) condensation. C) both of these D) neither of these

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Series/Parallel Circuits: A certain 20-A circuit breaker trips when the current in it equals 20 A. What is the maximum number of 100-W light bulbs you can connect in parallel in an ideal 120-V dc circuit without tripping this circuit breaker?

A. 11 B. 17 C. 23 D. 27

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Short-period comets, such as Halley's Comet, are believed to come from the ______________

Fill in the blank(s) with correct word

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