Q1.RAS 2021MediumBasics of Everyday ScienceIn Stethoscope, the sound of the patient’s heartbeat reaches the doctor’s ears by -A.Multiple diffraction of soundB.Multiple reflection of soundC.Polarization of soundD.Multiple refraction of soundReveal Answer
Q2.RAS 2018MediumBasics of Everyday ScienceWhich metal is generally used for coating of brass utensils to prevent copper contamination ?A.TinB.ZincC.AluminiumD.LeadReveal Answer
Q3.RAS 2018EasyBasics of Everyday ScienceWhich of the following is an example of a non-cellulosic fibre?A.RayonB.LinenC.JuteD.NylonReveal Answer
