What is the equivalent capacitance of the combination shown?





a.

20 ?F



b.

90 ?F



c.

22 ?F



d.

4.6 ?F



e.

67 ?F


a

Physics & Space Science

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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

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During summer in the Southern hemisphere of Mars, winds travel

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A Geiger counter is like an electroscope that discharges whenever ions formed by a radioactive particle produce a conducting path. A typical Geiger counter consists of a thin conducting wire of radius 0.002 cm stretched along the axis of a conducting cylinder of radius 2.0 cm. The wire and the cylinder carry equal and opposites charges of 8.0 × 10?10 C all along their length of 10.0 cm. What is the magnitude of the electric field at the surface of the wire?

What will be an ideal response?

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How is stepping off a curb similar to taking a ride aboard an orbiting space vehicle?

What will be an ideal response?

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