A particle is acted upon by a constant force, the magnitude of which is always perpendicular to the velocity of particle. The motion of particle takes place in same plane. From the above statement it implies
(A) Particle is moving in a circular path
(B) Magnitude of its acceleration is constant
(C) Its velocity is uniform
(D) Both (A) & (B).
Read the passage carefully and answer Q.
A dancer demonstrating dance steps along a straight line. The position time graph is given below.
The average velocity of the dancer during time interval between t = 4.5 s to t = 9 s is
(A) 1 ms-1
(B) -1.33 ms-1
(C) 2.75 ms-1
(D) - 0.89 ms-1.
A body goes from point X to point Y with a speed of 10 m s-1. It comes back to X with a speed of 20 m s-1. The average speed of the body during the journey is ______.
(a) 15 m s-1
(b) 16.6 m s-1
(c) 13.3 m s-1
(d) 30 m s-1
how to get answer ?
The given 24-hour clocks show sleeping time of cow, python, giraffe and cat.
Cow, python, giraffe and cat sleep for how many hours a day respectively?
(B) 1, 6, 3, 4
(C) 4, 18, 2, 12
(D) 2, 17, 1, 7
Which of the following is an incorrect match?
(A) Alexander Fleming - Penicillin
(B) Louis Pasteur - Fermentation
(C) Edward Jenner - Vaccination
(D) Anton von Leeuwenhoek - Sterilization.
i think it should be b because louis pasteur invented pasteruization
Which of these are excretory organs?
(B) (b) & (c)
(C) (a) & (c)
(D) (a), (b) & (c)
please explain how (a) is excretory organ.