A 35.0 kg child swings on a rope with a length of 6.50 m that is hanging from a tree. At the bottom of the swing the child is moving at a speed of 4.20 m/s. What is the tension in the rope?

A. 95.0 N
B. 438 N
C. 343 N
D. 366 N


B. 438 N

Physics & Space Science

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What is TRUE of radio telescopes?

A) They have poorer angular resolution than a refractor. B) They have better angular resolution than a reflector. C) They are the smallest, most compact telescopes. D) They can only be used above the atmosphere. E) They are most sensitive to the opacity of the ozone layer.

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Based on the definition of apparent brightness, which units are appropriate for its measurement?

A) watts B) joules C) watts per square meter D) Newtons

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A point charge of 6.0 nC is placed at the center of a hollow spherical conductor (inner radius = 1.0 cm, outer radius = 2.0 cm) which has a net charge of ?4.0 nC. Determine the resulting charge density on the inner surface of the conducting sphere

a. +4.8 ?C/m2 b. ?4.8 ?C/m2 c. ?9.5 ?C/m2 d. +9.5 ?C/m2 e. ?8.0 ?C/m2

Physics & Space Science

The polar vortex at the south pole of Venus is

A. a low-pressure, high-humidity storm, much like a hurricane on Earth. B. a region where cooler gases sink to the surface before moving back to the equatorial regions. C. a region of the atmosphere where the surface can be seen from orbit. D. a high-pressure zone with winds flowing away from its center.

Physics & Space Science