Question

Class 11 - Physics Which of the following vectors are conserved for an isolated system? 1. a) The total linear momentum b) The linear momentum of a c) The force on a particle d) The angular momentum of 2. SONAR emits which of the following waves? a) radio b) ultrasound 3. c) none of these d) light A truck has a velocity of 2 m/s at time t=0. It accelerates at 2 m/s2 on seeing its velocity in m/s at a time of 2 sec? a) 6 b) 3 1 c) 4 d) 7 At a distance L = 400m from the traffic lights, the brakes are applied to a locor moving at a velocity v = 54km/hr. Determine the position of locomotive relativ traffic lights 1 minute after the application of the brakes if its acceleration is -​

Answer 1

Answer:

SONAR uses ultrasound waves to detect an object in the sea. These are high frequency sound waves which are not lost in the way due to high energy. Light waves are not used as their intensity is very low.