Description : What should a person on a freely rotating turn table do to decrease his (angular) speed? (1) Bring his hands together (2) Raise his hands up (3) Spread his hands outwards (4) Sit down with raised hands
Last Answer : (3) Spread his hands outwards Explanation: The answer is related to the conservation of angular momentum. The person on the rotating table will maintain approximately the same angular momentum during the spin. ... by reducing the distance of the mass of her arms and hands from the axis of rotation.
Description : What should a person on a freely rotating turn able to decrease his angular speed?
Last Answer : Spread his hand outward
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
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
Description : If a gymnast sitting on a rotating stool, with his arms outstretched suddenly lowers his arm a.the angular velocity will remain constant b.the angular momentum will increase c.the angular velocity will decrease d.his moment of inertia will decrease e.107 dynes
Last Answer : d. his moment of inertia will decrease
Description : A marshaller crosses his/her hands in front of the face, palms outward and then moves the arms outwards. What does the signal indicate? a. Clear to move forward b. Brakes off c. Remove chocks d. Clear to close all engines
Last Answer : c. Remove chocks
Description : Two women sit staring and glaring at each other across a small table. Although the two women don't appear to be friendly toward each other, they do eventually hold each other's hands. A man approaches, puts ... is the word the man shouts to the women, and what in the world is going on here? -Riddles
Last Answer : The word the man shouts to the women is, 'Go!' This is the way most women's arm wrestling competitions start, and hopefully the wrist straps, to keep their hands from slipping apart, won't have to be used.
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
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
Description : A ball tied with a string to a rotating shaft revolves at uniform speed. As the shaft is suddenly brought to rest, the string starts getting round the shaft with the angular velocity of the ball (a) increasing (b) decreasing (c) remaining constant (d) becoming zero
Last Answer : Ans:(a)
Description : The rotating shaft or rotor vibrates with excessive lateral vibration at angular speed at which occurs is called as A) rotating speed B) critical speed C) vibrating speed D) None of the above
Last Answer : B) critical speed
Description : The unbalanced force caused by an eccentric mass m rotating at an angular speed v and located at a distance r from the axis of rotation is 2 a. mr ω 2 b. mgω 2 c. mr ω 2
Last Answer : c. mr ω 2
Description : Sapwood consists of (A) Innermost annular rings around the pith (B) Portion of timber between heartwood and cambium layer (C) Thin layers below the bark (D) Thin fibre which extends from the pith outwards and holds the annular rings together
Last Answer : Answer: Option B
Description : According to Coulomb's wedge theory, the active earth pressure slides the wedge (A) Down and outwards on a slip surface (B) Up and inwards on a slip surface (C) Horizontal upward and parallel to base (D) Horizontal inward and parallel to base
Last Answer : Answer: Option A
Description : A field that spreads outwards in all directions is A. radial B. non radial C. strong D. weak
Last Answer : radial
Description : A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have a.angular velocity b.centripental acceleration c.tangential acceleration d.all of the above e.107 dynes
Last Answer : c. tangential acceleration
Description : A flywheel 200 cm in diameter is rotating at 100 rpm. A point one the rim of the flywheel will not have a.angular velocity b.centripetal acceleration c.tangential acceleration d.all of the above e.107 dynes
Last Answer : a. angular velocity
Description : A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is a.1000 b.107 dynes c.10000 d.10470 e.5235
Last Answer : d. 10470
Description : A plane mirror rotating at an angular velocity of 3 radian/s reflects a light beam. The angular velocity of the reflected beam is -
Last Answer : A plane mirror rotating at an angular velocity of 3 radian/s reflects a light beam. The angular velocity of the reflected beam is -
Description : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity `omega.` the magnetic field produced by
Last Answer : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity ` ... D. `(mu_(0)lambda)/(2omega^(2))`
Description : For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the (A) Square of the radial distance (B) Radial distance linearly (C) Inverse of the radial distance (D) Elevation along vertical direction
Last Answer : (A) Square of the radial distance
Description : The relationship among twisting moment(T) acting on a rotating shaft, power in watt(W), and angular velocity in radian per second(w) will be (a) T = W/w (b) W = Tw (c) W = T/w (d) none of these
Last Answer : (b) W = Tw
Description : There are 10 persons who are to be seated around a circular table. Find the probability that two particular persons will always sit together. -Maths 9th
Last Answer : Total number of ways in which 10 person can sit around a circular table = 9! (∵ We shall keep one place fixed and the rest of the 9 places will be filled in (9 8 7 6 5 4 3 2 1) ways asthere is ... probability = \(rac{2 imes8!}{9!}\) = \(rac{2 imes8!}{9 imes8!}\) = \(rac{2}{9}.\)
Description : A committee of 11 members sit at a round table. In how many ways can they be seated if the “President” and the “Secretary” choose to sit together. -Maths 9th
Last Answer : ∴ Required number of ways of seating = 9!
Description : In how many ways can 7 men and 7 women sit on a round table such that no two women sit together? -Maths 9th
Last Answer : Now there are 7 places vacant between these 7 men. ∴ 7 women can seat themselves in these 7 places in 7 ! ways. ∴ Total number of required arrangement where no two women sit together = 6!
Description : How should I bring up a pay raise with this person?
Last Answer : Are you comfortable with lying? I do it all the time where I say I am booked but if they want to up their rate they can jump the queue.
Description : When a person stands on a scale in an elevator at rest, the scale reads 800 newtons. When the elevator is allowed to fall freely with acceleration of gravity, the scale reads one of the following. Does the scale read: w) 1600 newtons x) 800 newtons y) 400 newtons z) 0 newtons
Last Answer : ANSWER: Z -- 0 NEWTONS
Description : While catching a ball, a player pulls down his hands to lower the - (1) force/cy (2) momentum (3) impulse (4) catching time
Last Answer : (3) impulse
Description : While catching a ball, a player pulls down his hands to lower the – (1) force (2) momentum (3) impulse (4) catching time
Last Answer : (2) momentum Explanation: A cricketer lowers his hands while taking a catch to decrease the rate of momentum. Cricketers increase the time by pulling their hand's backward with the ball while taking a ... stop afterwards. If the truck were lighter, or moving slower, then it would have less momentum.
Description : While catching a ball, a player pulls down his hands to lower the– (1) force (2) momentum (3) impulse (4) catching time
Last Answer : momentum
Description : Explain whether there is acceleration of a rotating object at a balanced speed in a circular motion ?
Last Answer : : In a circular path, there is no acceleration of the rotating object at a balanced speed The rate of change of unequal velocity is called acceleration. So if the velocity is balanced , there will be no acceleration Be it in a circular way or in a straight way.
Description : Centripetal force is dependent on three factors, the odd one out of these factors is A. Mass of the rotating object B. Speed of the rotating object C. Volume of the rotating object D. Path radius
Last Answer : Volume of the rotating object
Description : A zinc plate is attached to the knob of a negatively charged electroscope. What will happen to the leaves of the electroscope when ultraviolet light is shown on the zinc plate. Will the leaves: w) collapse at once x) gradually come together y) gradually spread further apart z) remain unaffected
Last Answer : ANSWER: X -- GRADUALLY COME TOGETHER
Description : Can you freely approach an MRI machine if it has been turn off?
Last Answer : Yes, and even when MRI machines are in use, they are very safeif proper procedures are employed.
Description : Men stand up , girls raise their hands ?
Last Answer : : Field wall coating.
Description : You are sitting in a frictionless barber chair. The barber decides to have some fun with you, so he spins the chair. As you spin, you find that you can slow down by extending your ... increased your angular momentum y) increased your moment of inertia z) changed the direction of the momentum vector
Last Answer : ANSWER: Y --INCREASED YOUR MOMENT OF INERTIA
Description : Speed of an object travelling around a circle depends upon A. angular velocity B. radius C. circumference D. both A and B
Last Answer : both A and B
Description : Angular velocity of second hand of clock is 0.105 rad s-1 and length of hand is 1.8 cm, then speed of tip of hand is A. 0.189 cm s-1 B. 1 cm s-1 C. 0.189 m s-1 D. 2 m s-1
Last Answer : 0.189 cm s-1
Description : Consider a car driving around a circular bend in the road. Which of the following CANNOT be constant? w) velocity of car x) speed of car y) nonrelativistic mass of car z) angular momentum of the car about the center of the circle
Last Answer : ANSWER: W -- VELOCITY OF CAR
Description : You have 5 kids and you have to get them all into a car. Tommy and Timmy are twins but they fight so they can't sit together. Sarah and Sally fight too, so they can't sit together. Max fights with ... and you have to put them in order. How would you seat the kids, so that everyone is happy? -Riddles
Last Answer : Sarah, Tommy, Max, Timmy, and then Sally.
Description : Why hand power is low ? I can't do much! ? If I carry something heavy, I can no longer use my hands, if I carry something on my head , I have to raise my hands , if I hold it for a while, I can't use my hands anymore. What a problem! What to do ?
Last Answer : You can do push ups to increase the strength of your hands. Also do things that will increase the strength of your hands. Eat nutritious food every day. Thank you.
Description : Do you pin postcards up with the writing outwards or inwards?
Last Answer : I don’t have a board to post my posts on. My letters are lazily stored on my dresser, in a large envelope, and in a red box. If I were to tack them on a board, I would probably have the writing face me. Seeing the handwriting of friends and family makes me happy :)
Description : Which of the following would constitute the most proper action to take, if a child continues to talk after the class. has been asked to be quiet? Options: A) Speak loudly enough to be heard by ... the need for silence C) Make the whole class stay after school D) Arrange to speak to him privately
Last Answer : D) Arrange to speak to him privately
Description : In the first books of "Jason Bourne" by Robert Ludlum, is it realistic that the military and the CIA work together in a black ops project just to bring down one single man?
Last Answer : As I remember, Jason Bourne was a made up person. Yes, David Webb was a commando that played the role when a real human was needed. But they attributed pretty much every nifty hit that occurred in the ... Webb (Bourne). Could the CIA and military have cooked up such a thing? I don't see why not.
Description : Why do i have pigeon chest and flat feet? My lower left rib cage points outwards too. Theres no pain at all just wondering why i have this.
Last Answer : Genetics, buddy.
Description : The hypotenuse of an isosceles right-angled triangle is q. If we describe equilateral triangles (outwards) on all its three sides, -Maths 9th
Last Answer : (b) \(rac{q^2}{4}\) (2√3 + 1).AC = q, ∠ABC = 90º ⇒ q = \(\sqrt{AB^2+BC^2}\)⇒ q = \(\sqrt{2x^2}\)⇒ q2 = 2x2 ⇒ \(x\) = \(rac{q}{\sqrt2}\)∴ Area of the re-entrant hexagon = Sum of areas of (ΔABC + ΔADC ... (rac{\sqrt3}{4}\)q2 + \(rac{\sqrt3}{8}\)q2 + \(rac{\sqrt3q^2}{8}\) = \(rac{q^2}{4}\) (2√3 + 1).
Description : (i) Rent paid A/c (ii) Prepaid Insurance A/c (iii) Carriage Outwards A/c
Last Answer : Classify the following accounts under the types of Personal, Real, and Nominal accounts : (i) Rent paid A/ ... c (v) Profit on sale of machinery A/c
Description : The phrase, ̳soaring gradually downwards and outwards‘ shows that the young seagull a) Failed to fly. b) Was successful in flying. c) Tried to fly but could not. d) Felt unhappy.
Last Answer : b) Was successful in flying.