What is the speed of rotation ?

What is the speed of rotation ?
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If something is rotating at the same distance from a certain point, then it has rotational speed.
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We always see the same lace of the moon, because – (1) It is smaller than the earth (2) It revolves on its axis in a direction opposite to that of the earth (3) It takes equal time for revolution around the earth and rotation on its own axis (4) It rotates at the same speed as the earth around the sun

Description : We always see the same lace of the moon, because - (1) It is smaller than the earth (2) It revolves on its axis in a direction opposite to that of the earth (3) It takes equal time for revolution ... the earth and rotation on its own axis (4) It rotates at the same speed as the earth around the sun

Last Answer : (3) It takes equal time for revolution around the earth and rotation on its own axis Explanation: It is tidal locking that causes the synchronous rotation which causes the Moon to present "just one side ... to revolve (orbit) around the Earth. So it maintains a "constant face" in our direction.

We always see the same lace of the moon, because – (1) It is smaller than the earth (2) It revolves on its axis in a direction opposite to that of the earth (3) It takes equal time for revolution around the earth and rotation on its own axis (4) It rotates at the same speed as the earth around the sun

Description : We always see the same lace of the moon, because - (1) It is smaller than the earth (2) It revolves on its axis in a direction opposite to that of the earth (3) It takes equal time for revolution ... the earth and rotation on its own axis (4) It rotates at the same speed as the earth around the sun

Last Answer : (3) It takes equal time for revolution around the earth and rotation on its own axis Explanation: It is tidal locking that causes the synchronous rotation which causes the Moon to present "just one side ... to revolve (orbit) around the Earth. So it maintains a "constant face" in our direction.

We always see the same face of the moon, because (1) it is smaller than the earth (2) it revolves on its axis in a direction opposite to that of the earth (3) it takes equal time for revolution around the earth and rotation on its own axis (4) it rotates at the same speed as the earth around the sun

Description : We always see the same face of the moon, because (1) it is smaller than the earth (2) it revolves on its axis in a direction opposite to that of the earth (3) it takes equal time for revolution around the earth and rotation on its own axis (4) it rotates at the same speed as the earth around the sun

Last Answer : it takes equal time for revolution around the earth and rotation on its own axis

How to calculate the rate of rotation, in revolutions per minute.

Description : How to calculate the rate of rotation, in revolutions per minute.

Last Answer : answer:I’m going with 1.56 revs/min. Circumference = pi*d = 376.8 m Rate of rotation = 9.8 m/s, so it takes 38.4s to complete one rev. 60/38.4 = 1.56

What is rotation inertia ?

Description : What is rotation inertia ?

Last Answer : The inertia of an object which prevents it from changing its motion due to religion is called mass and mass is the measure of inertia of an object. The motion of an object which prevents it from changing its angular motion relative to a certain axis is called its rotational inertia or inertia.

What is rotation friction ?

Description : What is rotation friction ?

Last Answer : When an object rolls over another surface, the force of friction that acts against the motion is called rotational friction force. The speed of the wheel of the bicycle, the speed of the marble is an example of rotating friction.

Fibre optics work on the principle of - (1) scattering of light (2) total internal absorption (3) total internal reflection (4) option rotation

Description : Fibre optics work on the principle of - (1) scattering of light (2) total internal absorption (3) total internal reflection (4) option rotation

Last Answer : (3) total internal reflection Explanation: An optical fibre is a cylindrical dielectric waveguide (non-conducting waveguide) that transmits light along its axis, by the process of total internal reflection.

The rotational effect of a force on a body about an axis of rotation is described in terms of the (1) Centre of gravity (2) Centripetal force (3) Centrifugal force (4) Moment of force

Description : The rotational effect of a force on a body about an axis of rotation is described in terms of the (1) Centre of gravity (2) Centripetal force (3) Centrifugal force (4) Moment of force

Last Answer : (4) Moment of force Explanation: The rotational effect of a force on a body about an axis of rotation is described in terms of the Moment of force.

______ is the perpendicular distance between point of application of force and axis of rotation. (1) Moment arm (2) Moment of Inertia (3) Altitude (4) Base

Description : ______ is the perpendicular distance between point of application of force and axis of rotation. (1) Moment arm (2) Moment of Inertia (3) Altitude (4) Base

Last Answer : (1) Moment arm Explanation: The magnitude of the moment of force acting about a point or axis is directly proportional to the distance of the force from the point or axis.

If in a motion, the axis of the rotation does not pass through the object, then the motion is called - (1) Spin motion (2) Oscillatory motion (3) Translatory motion (4) Orbital motion

Description : If in a motion, the axis of the rotation does not pass through the object, then the motion is called - (1) Spin motion (2) Oscillatory motion (3) Translatory motion (4) Orbital motion

Last Answer : (4) Orbital motion Explanation: The axis of the rotation does not pass through the object in orbital motion. It involves the quantum mechanical motion of rigid particles (such as electrons) about some other mass, or about them selves.

Why the Earth is having its own atmosphere? (1) Winds (2) Clouds (3) Gravity (4) Rotation of the Earth

Description : Why the Earth is having its own atmosphere? (1) Winds (2) Clouds (3) Gravity (4) Rotation of the Earth

Last Answer : (3) Gravity Explanation: Due to gravity, our Earth has an atmosphere, Gravity causes the gases to be held close to the earth instead of escaping into outer space.

The rotational effect of a force on a body about an axis of rotation is described in terms of the (1) Centre of gravity (2) Centripetal force (3) Centrifugal force (4) Moment of force

Description : The rotational effect of a force on a body about an axis of rotation is described in terms of the (1) Centre of gravity (2) Centripetal force (3) Centrifugal force (4) Moment of force

Last Answer : (4) Moment of force Explanation: The rotational effect of a force on a body about an axis of rotation is described in terms of the Moment of force.

The moment of inertia of a body does not depend upon its – (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass

Description : The moment of inertia of a body does not depend upon its – (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass

Last Answer : (2) angular velocity Explanation: Moment of inertia is the mass property of a rigid body that determines the torque needed for a desired angular acceleration about an axis of rotation. Moment of inertia ... of moments of inertia of the masses making up the whole object, under the same conditions.

A larger force on a rotating body results in larger _______. (1) Mass (2) Torque (3) Axis of rotation (4) Centre of mass

Description : A larger force on a rotating body results in larger _______. (1) Mass (2) Torque (3) Axis of rotation (4) Centre of mass

Last Answer : (3) Axis of rotation

If in a motion, the axis of the rotation passes through an object, then the motion is called. (1) Orbital motion (2) Circulatory motion (3) Spin motion (4) Oscillatory motion

Description : If in a motion, the axis of the rotation passes through an object, then the motion is called. (1) Orbital motion (2) Circulatory motion (3) Spin motion (4) Oscillatory motion

Last Answer : (3) Spin motion Explanation: A rotation is a circular movement of an object around a center (or point) of rotation A threedimensional object al ways rotates around an imaginary line called a rotation axis.

The atmospheric air is held to the Earth by – (1) gravity (2) winds (3) clouds (4) rotation of the Earth

Description : The atmospheric air is held to the Earth by – (1) gravity (2) winds (3) clouds (4) rotation of the Earth

Last Answer : (1) gravity Explanation: The atmosphere is an ocean of air held in place by gravity, extending from the surface to an altitude of hundreds of kilometers, the edge of space. Energy from the sun heating the air and land surface to different degrees, drives atmospheric circulation.

Fibre optics work on the principle of – (1) Scattering of light (2) Total internal absorption (3) Total internal reflection (4) Optical rotation

Description : Fibre optics work on the principle of – (1) Scattering of light (2) Total internal absorption (3) Total internal reflection (4) Optical rotation

Last Answer : (3) Total internal reflection Explanation: An optical fiber (or optical fibre) is a flexible, transparent fiber made of glass (silica) or plastic, slightly thicker than a human hair. It ... science and engineering concerned with the design and application of optical fibers is known as fiber optics.

Center of gravity of an irregular body lies on the A. edgeB. center of body C. point of intersection of lines D. along the axis of rotation

Description : Center of gravity of an irregular body lies on the A. edge B. center of body C. point of intersection of lines D. along the axis of rotation

Last Answer : point of intersection of lines

Moment of force depends upon A. magnitude of force B. perpendicular distance of force from pivot C. both A and B D. axis of rotation

Description : Moment of force depends upon A. magnitude of force B. perpendicular distance of force from pivot C. both A and B D. axis of rotation

Last Answer : both A and B

When a mass is rotating in a plane about a fixed point, its angular momentum is directed along: (1) the tangent to the orbit (2) a line perpendicular to the plane of rotation (3) the line making an angle of 45° to the plane of rotation (4) the radius

Description : When a mass is rotating in a plane about a fixed point, its angular momentum is directed along: (1) the tangent to the orbit (2) a line perpendicular to the plane of rotation (3) the line making an angle of 45° to the plane of rotation (4) the radius

Last Answer : (2) a line perpendicular to the plane of rotation

An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of inertia is increased. x) Kinetic energy is conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Description : An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of ... conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Last Answer : ANSWER: Y -- THE SKATER DOES WORK WHEN PULLING IN HER ARMS 

The moment of inertia of a body does not depend upon its (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass

Description : The moment of inertia of a body does not depend upon its (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass

Last Answer : angular velocity

The atmospheric air is held to the Earth by : (1) gravity (2) winds (3) clouds (4) rotation of the Earth

Description : The atmospheric air is held to the Earth by : (1) gravity (2) winds (3) clouds (4) rotation of the Earth

Last Answer : gravity

Fibre optics work on the principle of (1) scattering of light (2) total internal absorption (3) total internal reflection (4) optical rotation

Description : Fibre optics work on the principle of (1) scattering of light (2) total internal absorption (3) total internal reflection (4) optical rotation

Last Answer :  total internal reflection

A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he a.extends his arms outwards b.moves towards the axis of rotation c.jumps out from the platform d.accepts a heavy bag from one of his friends standing near by and holds it in his hand e.107 dynes

Description : A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he a.extends his arms outwards b.moves ... heavy bag from one of his friends standing near by and holds it in his hand e.107 dynes

Last Answer : d. accepts a heavy bag from one of his friends standing near by and holds it in his hand

A man is standing ner the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platorm will decrease if he a.extends his arms outwards b.107 dynes c.moves towards the axis of rotation d.jumps out from that platform e.take out his coat and throws away

Description : A man is standing ner the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platorm will decrease if he a.extends his arms outwards b.107 ... towards the axis of rotation d.jumps out from that platform e.take out his coat and throws away

Last Answer : a. extends his arms outwards

In the speed of rotation of earth decreases, the weight of the body will a.Decrease b.Remain unaltered c.Depends on speed ratio d.Cannot be ascertained on the basis the information given e.Increase

Description : In the speed of rotation of earth decreases, the weight of the body will a.Decrease b.Remain unaltered c.Depends on speed ratio d.Cannot be ascertained on the basis the information given e.Increase

Last Answer : c. Depends on speed ratio

A flywheel weighs 400 kg and has a radius of gyration of 30 cm about its axis of rotation. It is mounted on a shaft subjected to a moment of 40 kgm. If the flywheel starts from restits speed after 3 seconds wil be a.10.9 rad/sec b.19.0 rad/sec c.51.2 rad/sec d.3.33 rad/sec e.16.35 rad/sec

Description : A flywheel weighs 400 kg and has a radius of gyration of 30 cm about its axis of rotation. It is mounted on a shaft subjected to a moment of 40 kgm. If the flywheel starts from restits speed after 3 seconds wil be a.10.9 rad/sec b.19.0 rad/sec c.51.2 rad/sec d.3.33 rad/sec e.16.35 rad/sec

Last Answer : d. 3.33 rad/sec

Where is the speed of rotation of the earth highest? -Do You Know?

Description : Where is the speed of rotation of the earth highest? -Do You Know?

Last Answer : answer:

Explain the difference between rotation , motion speed and oscillation speed ?

Description : Explain the difference between rotation , motion speed and oscillation speed ?

Last Answer : If an object rotates around its center point, it is called rotational speed. If the motion of an object is along a straight line, then this motion is called motion motion. If a particle with ... In the case of oscillation motion, the object is reversed during one period and reversed the other half.

What is the speed of rotation ?

Description : What is the speed of rotation ?

Last Answer : The speed of rotation is called the annual speed.

What is the English meaning of rotation speed ?

Description : What is the English meaning of rotation speed ?

Last Answer : rotational speed English circular motion.

What is the speed of rotation ?

Last Answer : The motion that has both rotation and motion is called rotational motion.

What is the speed of rotation ?

Last Answer : Not all the points of a moving object follow the same path.

If the radius of rotation and the mass being kept constant how does centripetal force vary with the speed of rotation body?

Description : If the radius of rotation and the mass being kept constant how does centripetal force vary with the speed of rotation body?

Last Answer : Feel Free to Answer

What is the Speed of moon in rotation?

Description : What is the Speed of moon in rotation?

Last Answer : According to Wikipedia,"On average, the distance to the Moon is about 385,000 km (239,000 mi) from Earth's center, which corresponds to about 60 Earth radii. With a mean orbital velocity of ... about half a degree on the celestial sphere, each hour."- https://en.wikipedia.org/wiki/Orbit_of_the_Moon

determine the speed of rotation of a 20 tooth gear when it is driven by a 40 tooth gear and rotating at 10 rpm?

Description : determine the speed of rotation of a 20 tooth gear when it is driven by a 40 tooth gear and rotating at 10 rpm?

Last Answer : i am the one that asked i dont know the answer

The _____________ sensor, senses rotation of engine camshaft for speed and timing of injection. a) throttle position b) manifold pressure c) camshaft position d) knock

Description : The _____________ sensor, senses rotation of engine camshaft for speed and timing of injection. a) throttle position b) manifold pressure c) camshaft position d) knock

Last Answer : Answer: c Explanation: The camshaft position sensor, senses rotation of engine camshaft for speed and timing of injection whereas the throttle position sensor, senses the movement of the throttle ... engine intake manifold so that the mixture strength can be adjusted with changes in engine load.

A body weighs slightly more at the poles than at the equator because (a) the earth is flat at the poles. (b) the earth has the maximum speed of rotation at the equator (c) the attractive force at the poles increases due to the ice cap (d) none of these is a complete explanation

Description : A body weighs slightly more at the poles than at the equator because (a) the earth is flat at the poles. (b) the earth has the maximum speed of rotation at the equator (c) the attractive force at the poles increases due to the ice cap (d) none of these is a complete explanation

Last Answer : Ans:(d)

If speed of rotation of the earth increases, the weight of the body – (1) decreases (2) increases (3) remains the same (4) may increase or decrease

Description : If speed of rotation of the earth increases, the weight of the body – (1) decreases (2) increases (3) remains the same (4) may increase or decrease

Last Answer : (1) decreases Explanation: The weight of a body on the earth is the amount of gravitational pull on it exerted by the earth. Similarly there is another force exerted on a body on earth, that ... under the influence of the centrifugal force and the weight of the body will seem to have decreased.

Which statement is true concerning a split-phase induction motor? A. Motor rotation can be reversed without changing the windings or leads. B. Motor speed can be readily adjusted from zero to full speed. C. The motor will run as a generator with the proper wiring. D. Motor rotation can be reversed by reversing the leads on the starting winding.

Description : Which statement is true concerning a split-phase induction motor? A. Motor rotation can be reversed without changing the windings or leads. B. Motor speed can be readily adjusted from zero to full ... proper wiring. D. Motor rotation can be reversed by reversing the leads on the starting winding.

Last Answer : Answer: D

How the speed of rotation of a split phase induction motor is reversed?

Description : How the speed of rotation of a split phase induction motor is reversed?

Last Answer : The terminal connections of the starting windings are reversed with respect to main running windings..

What speed of rotation of the earth?

Description : What speed of rotation of the earth?

Last Answer : 9.72 km/sec.

Where is the speed of rotation of the earth highest?

Description : Where is the speed of rotation of the earth highest?

Last Answer : Along the Equator

Where is the speed of rotation of the earth highest?

Description : Where is the speed of rotation of the earth highest?

Last Answer : Along the Equator

A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is (A) ½w 2 . R 2 . ρL (B) ½w 2 . δ 2 . ρL (C) ½w 2 . δρL (2R + δ) (D) ½w 2 . R . ρL(R + 2δ)

Description : A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The ... . ρL (C) ½w 2 . δρL (2R + δ) (D) ½w 2 . R . ρL(R + 2δ)

Last Answer : (C) ½w 2 . δρL (2R + δ)

What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls? (A) 0.5 (B) 1.0 (C) 2.76 (D) 0.66

Description : What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls? (A) 0.5 (B) 1.0 (C) 2.76 (D) 0.66

Last Answer : (D) 0.66

Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m). (A) 3.6 V.W.Dr.ρ (B) 3.6 V.W. ρ (C) 3.6 W.Dr.ρ (D) 3.6 V.W.Dr/ρ

Description : Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls ... V.W.Dr.ρ (B) 3.6 V.W. ρ (C) 3.6 W.Dr.ρ (D) 3.6 V.W.Dr/ρ

Last Answer : (A) 3.6 V.W.Dr.ρ

Critical speed of rotation, N (in rps - rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec 2 and, r = radius of trammel, metre.) (A) (1/2π). √(g/r) (B) (1/π). √(g/r) (C) ½ √(g/r) (D) 2π. √(g/r)

Description : Critical speed of rotation, N (in rps - rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec 2 and, r = radius of trammel, metre.) (A) (1/2π). √(g/r) (B) (1/π). √(g/r) (C) ½ √(g/r) (D) 2π. √(g/r)

Last Answer : (A) (1/2π). √(g/r)

What is the effect on the magnitude of emf generated in an AC generator if the speed of rotation is increased?

Description : What is the effect on the magnitude of emf generated in an AC generator if the speed of rotation is increased?

Last Answer : The magnitude of emf generated increases.