The period of revolution of a satellite orbiting Earth at a height 4R above the surface of Earth is x hrs, where R is the radius of earth. The period of another satellite at a height 1.5R from the surface of the Earth is

Anonymous User Physics Gravitation and Projectile 03 May, 2020 1 Answer 70 views




A planet of radius R = 1/10 (radius of Earth) has the same mass density as Earth. Scientists dig a well of 10 depth R5 on it and lower a wire of the same length and of linear mass density 10–3 kg m–1 into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it in place is (take the radius of Earth = 6 × 106 m and the acceleration due to gravity on Earth is 10 ms–2)

Anonymous User Physics Gravitation and Projectile 03 May, 2020 1 Answer 188 views

A satellite is moving with a constant speed V in a circular orbit about the earth. An object of mass m is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

Anonymous User Physics Gravitation and Projectile 02 May, 2020 1 Answer 69 views




The time period of a satellite of the earth is 10 hours. If the separation between the earth and the satellite is increased to 4 times the previous value, then what will be the new time period of the satellite?

Anonymous User Physics Gravitation and Projectile 02 May, 2020 1 Answer 56 views








 In a crystalline solid, anion B are arranged in cubic close packing and cation A are equally distributed between octahedral and tetrahedral voids. If all the octahedral voids are occupied, the formula for the solid is

Anonymous User Chemistry Solid State 02 May, 2020 1 Answer 136 views






Two physical pendulums perform small oscillations about the same horizontal axis with frequencies w1 and w2. Their moments of inertia relative to the given axis are equal to I1 and I2 respectively. In a state of stable equilibrium, the pendulums were fastened rigidly together. What will be the frequency of small oscillations of the compound pendulum?

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 76 views

A physical pendulum performs small oscillations about the horizontal axis with frequency co = 15.0 s-1 . When a small body of mass m = 50 g is fixed to the pendulum at a distance l = 20 cm below the axis, the oscillation frequency becomes equal to w2 = 10.0 s-1. Find the moment• of inertia of the pendulum relative to the oscillation axis.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 61 views

A physical pendulum is positioned so that its centre of gravity
is above the suspension point. From that position the pendulum
started moving toward the stable equilibrium and passed it with an
angular velocity w. Neglecting the friction find the period of small
oscillations of the pendulum.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 58 views

An arrangement illustrated in Fig consists of a horizontal uniform disc D of mass m and radius R and a thin rod AO whose torsional coefficient is equal to k. Find the amplitude and the energy of small torsional oscillations if at the initial moment the disc was deviated through an angle φ, from the equilibrium position and then imparted an angular velocity φo.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 61 views

A uniform rod of mass m = 1.5 kg suspended by two identical threads 1 = 90 cm in length (Fig) was turned through a small angle about the vertical axis passing through its middle point C. The threads deviated in the process through an angle a = 5.0°.Then the rod was released to start performing small oscillations.Find:
(a) the oscillation period;
(b) the rod's oscillation energy.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 57 views

A pendulum is constructed as a light thin-walled sphere of radius R filled up with water and suspended at the point 0 from a light rigid rod (Fig). The distance between the point 0 and the centre of the sphere is equal to 1. How many times will the small oscillations of such a pendulum change after the water freezes? The viscosity of water and the change of its volume on freezing are to be neglected.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 71 views

 

A particle of mass m moves in the plane xy due to the force varying with velocity as F = a (yi — xj), where a is a positive constant,i and j are the unit vectors of the x and y axes. At the initial moment t = 0 the particle was located at the point x = y = 0 and possessed a velocity v0 directed along the unit vector j. Find the law of motion x (t) , y (t) of the particle, and also the equation of its trajectory.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 80 views


A body of mass m fell from a height h onto the pan of a spring balance (Fig.)The masses of the pan and the spring are negligible, the stiffness of the latter is x. Having stuck to the pan, the body starts performing harmonic oscillations in the vertical direction. Find the amplitude and the energy of these oscillations.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 62 views

A particle of mass in moves due to the force F = - αmr,where a is a positive constant, r is the radius vector of the particle relative to the origin of coordinates. Find the trajectory of its motion if at the initial moment r = roi and the velocity v = voj, where I and j are the unit vectors of the x and y axes.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 57 views

A mathematical pendulum oscillates in a medium for which the logarithmic damping decrement is equal to 20 = 1.50. What will be the logarithmic damping decrement if the resistance of the medium increases n = 2.00 times? How many times has the resistance of the medium to be increased for the oscillations to become impossible?

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 55 views

A body of mass in was suspended by a non-stretched spring, and then set free without push. The stiffness of the spring is x.Neglecting the mass of the spring, find:
(a) the law of motion y (t) , where y is the displacement of the body from the equilibrium position;
(b) the maximum and minimum tensions of the spring in the process of motion.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 56 views

A plank with a body of mass m placed on it starts moving straight up according to the law y = a (1 — cos wt), where y is the displacement from the initial position w = 11 /s. Find:
(a) the time dependence of the force that the body exerts on the plank if a = 4.0 cm; plot this dependence;
(b) the minimum amplitude of oscillation of the plank at which the body starts falling behind the plank;
(c) the amplitude of oscillation of the plank at which the body springs up to a height h = 50 cm relative to the initial position (at the moment t = 0).

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 77 views


A plank with a bar placed on it performs horizontal harmonic oscillations with amplitude a = 10 cm. Find the coefficient of friction between the bar and the plank if the former starts sliding along the plank when the amplitude of  scillation of the plank becomes less than T = 1.0 s.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 71 views

In the arrangement shown in Fig the sleeve M of mass m=0.20 kg is fixed between two identical springs whose combined stiffness is equal to x = 20 N/m. The sleeve can slide without friction over a horizontal bar AB. The arrangement rotates with a constant angular velocity w = 4.4 rad/s about a vertical axis passing through the middle of the bar. Find the period of small oscillations of the sleeve. At what values of o will there be no oscillations of the sleeve?.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 66 views

Imagine a shaft going all the way through the Earth from pole to pole along its rotation axis. Assuming the Earth to be a homogeneous ball and neglecting the air drag, find:

(a) the equation of motion of a body falling down into the shaft;

(b) how long does it take the body to reach the other end of the shaft;

(c) the velocity of the body at the Earth's centre

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 63 views

A uniform rod is placed on two spinning wheels as shown in Fig. The axes of the wheels are separated by a distance 1= 20 cm,the coefficient of friction between the rod and the wheels is k = 0.18. Demonstrate that in this case the rod performs harmonic oscillations. Find the period of these oscillations.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 100 views

Determine the period of oscillations of mercury of mass = 200 g poured into a bent tube (Fig.) whose right arm forms an angle 0 = 30° with the vertical. The cross-sectional area of the tube is S = 0.50 cm2. The viscosity of mercury is to be neglected.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 68 views

A small body of mass in is fixed to the middle of a stretched string of length 2l. In the equilibrium position the string tension is equal to To. Find the angular frequency of small oscillations of the body in the transverse direction. The mass of the string is negligible,the gravitational field is absent.

Anonymous User Physics Oscillation 02 May, 2020 1 Answer 63 views