A 35.0 kg girl swings on a swingset. At the bottom of the swing’s path, she feels as though she weighs 435 N. What is the value of the tension in the swing’s ropes at the bottom of the swing’s path?
A. 92 N
B. 435 N
C. 343 N
D. 778 N
D. 778 N
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How much power is theoretically available from a mass flow of 1000 kg/s of water when it falls a vertical distance of 100 meters?
a. 980 kW b. 98 kW c. 4900 W d. 980 W e. 9600 W
What is the next energy level that fills after the 4d energy level is full?
a. 5p c. 6s b. 4s d. 4f
It was once thought that a "black hole" absorbed all the radiation falling upon it and radiated none
If this were true, what would one infer the temperature of a black hole to be? Actually Stephen Hawking discovered that black holes have a VERY small probability of radiating. Modifying your first answer, would you now infer a large or small temperature for a black hole.?
Two long parallel wires carry unequal currents in the same direction. The ratio of the currents is 3 to 1 . The magnitude of the magnetic field at a point in the plane of the wires and 10 cm from each wire is 4.0 mT. What is the larger of the two currents?
a. 5.3 A b. 3.8 A c. 4.5 A d. 3.0 A e. 0.5 A