Irodov – Problems in General Physics
one of its points. Find the distance between the centre of inertia of the rod and the axis 00' at which the oscillation period i ...
of the pulley. Find the frequency of small oscillations of the arrange- ment. 4.56. A solid uniform cylinder of radius r rolls w ...
In equilibrium the piston divides the cylinder into two equal parts, each with volume Vo. The gas pressure is Po. The piston was ...
(a) the angular velocity cp and the angular acceleration cp of the body at the moment t = 0; (b) the moments of time at which th ...
4.79. A thin uniform disc of mass m and radius R suspended by an elastic thread in the horizontal plane performs torsional oscil ...
4.84. A particle of mass m can perform undamped harmonic oscil- lations due to an electric force with coefficient k. When the pa ...
(b) the frequency co of the force F at which (P) is maximum; what is (P),,„„ equal to? 4.92. An external harmonic force F whose ...
4.94. Due to a certain cause the free electrons in a plane copper plate shifted over a small distance x at right angles to its s ...
R Fig. 4.29. wires is negligible. The coil is placed in a permanent magnetic field so that the total flux passing through all th ...
T L LR (b) L2 (a) Fig. 4.31. is R = 1.0 Q. At a certain moment the switch Sw was disconnected. Find the energy of oscillations ...
disconnected, the capacitor was charged to a voltage Vo, and at the moment t = 0 the switch was closed. Find the current I in th ...
resistance is connected to an oscillator whose frequency can be vari- ed without changing the voltage amplitude. Find the freque ...
(/ (^0) //) generated by the two voltages if the quality factor of the system is equal to Q. Calculate this ratio for Q = 10 and ...
R 4.142. A coil and an inductance-free resistance R = 25 Q are connected in parallel to the ac mains. Find the heat power genera ...
4.149. A wooden core (Fig. 4.36) supports two coils: coil 1 with inductance L 1 and short-circuited coil 2 with active resistanc ...
4.150. How long will it take sound waves to travel the distance^1 between the points A and B if the air temperature between them ...
4.159. A point isotropic source generates sound oscillations with frequency v = 1.45 kHz. At a distance r, = 5.0 m from the sour ...
4.166. A string 120 cm in length sustains a standing wave, with the points of the string at which the displacement amplitude is ...
the same velocity. As this takes place, the observer hears the beatings with frequency v = 2.0 Hz. Find the velocity of each tun ...
4.184. An observer A located at a distance rA —5,0 m from a ringing tuning fork notes the sound to fade away T = 19 s later than ...
«
5
6
7
8
9
10
11
12
13
14
»
Free download pdf