Find the frequencies of the first three harmonics of a 1.0-m long string which has a mass per unit length of 2.0 × 10^?3 kg/m and a tension of 80 N when both ends are fixed in place
100 Hz, 200 Hz, 300 Hz
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Water is flowing through a V-shaped weir, which has a 30° vertex
The flow rate is 7.0 x 104 kg/s and the speed of the flow is 5.0 m/s. What is the distance from the surface of the water to the vertex? A) 3.6 m B) 7.2 m C) 4.8 m D) 9.6 m E) 14.4 m
Rotational Kinetic Energy: A solid uniform disk of diameter 3.20 m and mass 42 kg rolls without slipping to the bottom of a hill, starting from rest. If the angular speed of the disk is 4.27 rad/s at the bottom, how high did it start on the hill?
A. 3.57 m B. 2.68 m C. 3.14 m D. 4.28 m
A beetle (black dot on the top view shown below) sits on a rapidly rotating turntable. The table rotates faster and faster, and eventually the beetle loses its grip. What is its subsequent trajectory relative to the ground (assuming it cannot fly)?
A. A
B. B
C. B
D. D
E. E
In a color television tube, electrons are accelerated through a potential difference of 20,000 volts. With what velocity do the electrons strike the screen?