A 100-m long transmission cable is suspended between two towers. If the mass density is 2.01 kg/m and the tension in the cable is 3.00 × 10^4 N, what is the speed of transverse waves on the cable?

a. 60 m/s
b. 122 m/s
c. 244 m/s
d. 310 m/s
e. 1 500 m/s


b

Physics & Space Science

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A tennis ball bounces on the floor three times, and during each bounce 23% of its kinetic energy (assuming that at the collision with the floor the ball-Earth system only had kinetic energy) is converted to internal energy

How high does it go after the third bounce, if we released it 4.0 m from the floor? A) 180 cm B) 18 cm C) 180 mm D) 240 cm

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A superconducting wire carries a current of 1.0 × 10^4 A. Find the magnetic field at a distance of 1.0 m from the wire

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Two blocks of masses 20 kg and 9.0 kg are connected together by a light string and rest on a frictionless level surface. Attached to the 9.0-kg mass is another light string, which a person uses to pull both blocks horizontally. If the two-block system accelerates at 0.80 m/s2, what is the tension in the second string attached to the 9.0-kg mass?

a. 23 N b. 14 N c. 16 N d. 7.2 N e. 25 N

Physics & Space Science

In the diagram below, what is the diameter of Jupiter?



a. about 7.0 x 104 km
b. about 7.0 x 105 km
c. about 1.4 x 104 km
d. about 1.4 x 105 km
e. about 3.5 x 106 km

Physics & Space Science