Q.1 Definematter?Giveexamples. [1]
Q.2 Whyisnucleuscalleddirectorofthecell? [1]
Q.3 Whatismeantbyangularvelocity?WriteitsSIunit. [2]
Q.4 Whendowesaytheaccelerationofabodyiszero? [2]
Q.5 Givereasonforthefollowingobservationthesmellofhotsizzlingfoodreachesyouseveralmetres
away,buttogetthesmellfromcoldfoodyouhavetogoclose? [2]
Q.6 WhyareMitochondriaknownaspowerhouseofthecell? [2]
Q.7 Aracingcarhasauniform accelerationof4ms
–2.Whatdistancewillitcoverin10secondsafterthe
start? [3]
Q.8 Ascooteracquiresavelocityof36km perhourin10secondsjustafterthestart.Calculatethe
acceleration
ofthescooter. [3]
Q.9 Differentiatebetweenevaporation&boiling. [1×3=3]
Q.10 Define-a)Diffusion b)Osmosis [3]
Q.11 HowdoesAmoebaobtainitsfood? [3]
Q.12 Explainusingdistance–timegraphs [1+1+3=5]
a)Whenthebodyisatrest
b)Whenthebodyismovingwithauniformspeed
c)Whenthebodyismovingwithanon-uniformspeed.
Q.13 Writethevariousfactorswhichaffectstherateofevaporation? [1×5=5]
Q.14 Differentiatebetweenprokaryoticandeukaryoticcell.
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The expression for orbital velocity is √g( R+h) = √gr. Orbital velocity is the velocity needed to balance the pull of gravity on the satellite with the inertia of the motion of the satellite, the tendency of the satellite to continue.
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bhai tumhara question bahut bada hai
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