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Two identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed . The discs are in the same horizontal plane. At time t = 0, the points P and Q are facing each other as shown in the figure. The relative speed between the two points P and Q is vr . In one time period (T) of rotation of the discs, vr as a function of time is best represented by - jee main 20121 AnswerConsider a disc rotating in the horizontal plane with a constant angular speed about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side a shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) remains constant throughout. Then - jee main 2012 physics 1 AnswerThe recurrence relation capturing the optimal execution time of the Towers of Hanoi problem with n discs is-gate-computer science-20121 AnswerThe recurrence relation capturing the optimal execution time of the Towers of Hanoi problem with n discs is -gate-cse-20121 AnswerA slider-crank mechanism with crank radius 60 mm and connecting rod length 240 mm is shown in figure. The crank is rotating with a uniform angular speed of 10 rad/s, counter clockwise. For the given configuration, the speed (in m/s) of the slider is 1 AnswerThe time taken by a person to cover 150 km was 2(1/2) hours more than the time taken in the return journey. If he returned at a speed of 10 km/hour more than the speed while going, find the speed per hour in each direction. CBSE Mathematics1 AnswerA wheel 0.5 m in radius is moving with a speed of 12 m/s. Find its angular speed. -Physics Cbse class 11 1 AnswerConsider the following figure of line MN . Say whether following statements are true or false in the context of the given figure: (a) Q, M, O, N, P are points on the line MN. (b) M, O, N are points on a line segment MN. (c) M and N are end points of line segment MN. (d) O and N are end points of line segment OP . (e) M is one of the end points of line segment QO . (f) M is point on ray OP . (g) Ray OP is different from ray OP . (h) Ray OP same as ray OM.. (i) Ray OM. is not opposite to ray OP . (j) O is not an initial point of NP and NM .-Mathematics-cbse-std 6th-Basic Geometry1 AnswerWhat can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis? - Physics Cbse class 11 1 AnswerA box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a prime-number less than 23, is: Mathematics CBSE class 10 20131 AnswerConsider a disk pack with a seek time of 4 milliseconds and rotational speed of 10000 rotations per minute (RPM). -gate-cse-20151 AnswerA ray of light LM is incident on a mirror as shown in the figure. The angle of incidence for this ray is the angle between it and the line joining two other points in the figure. Name these two points. -2009 CBSE Physic class 101 AnswerThe speed of a boat is 2 km per hour. How much time does it take to go a distance of 32km? NCERT maths CLASS 5TH CBSE 20161 AnswerComparing the time T1 taken for a single instruction on a pipelined CPU with time T2 taken on a nonยญ pipelined but identical CPU, we can say that?GATE CSE 20001 AnswerAn infinitely long hollow conducting cylinder with inner radius R/2 and outer radius R carries a uniform current density along its length. The magnitude of the magnetic field, | B | as a function of the radial distance r from the axis is best represented by - jee main 2012 physics 1 AnswerFill in the blanks GATE-Instrumentation-Engineering-20141 AnswerFor the discrete-time system shown in the figure, the poles of the system transfer function are located at-GATE EC 20151 AnswerA continuous-time function x(t) is periodic with period T. The function is sampled uniformly with a sampling period ๐๐ . In which one of the following cases is the sampled signal periodic?Gate-20161 AnswerA loop carrying current I lies in the x-y plane as shown in the figure. The unit vector ห k is coming out of the plane of the paper. The magnetic moment of the current loop is - jee main 20121 AnswerThe distance between two points measured along a slope is 800 m Find the distance between the points if i The difference in level between the points is 60 m ii The angle of slope between the points is 10 0 Dec 2012 June July2011?1 Answer