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 2018EasyBasics of Everyday ScienceWhich of the following is an example of a non-cellulosic fibre?A.RayonB.LinenC.JuteD.NylonReveal Answer
Q3.RAS 2018MediumBasics of Everyday ScienceWhich metal is generally used for coating of brass utensils to prevent copper contamination ?A.TinB.ZincC.AluminiumD.LeadReveal Answer
