Community
Ask a doubt, help a classmate, or see what everyone is working through. Saki answers every question first.
18 questions
We learned today that the left ventricle's wall is way thicker than the right ventricle's, but they both just pump blood, right? Why does one side need so much more muscle?
PinnedRBRiya BanerjeeHelper20 h ago2 answersBiology#heart#anatomy#circulation2answersOn the Whirlwind ride at the fair I definitely felt pushed outward against the wall. My teacher says that’s not a real force. Who’s right?
ZMZoya MalikHelper15 h ago2 answersPhysics#circular-motion#centrifugal-force2answersI get that binary search is faster than checking every element, but why does it break completely if the list isn't sorted?
INIshaan NairMentor2 h ago0 answersComputer Science#algorithms#binary-search0answersI flipped a coin and got heads five times in a row. Doesn’t that mean tails is more likely to come up next?
VRVihaan RathoreNewcomer1 day ago1 answerMathematics#probability1answerThis seems backwards to me. 8 + 8 = 16, which is more than 12. How can one 12-inch pizza have more pizza than two 8-inch ones?
HSHeer ShahHelper2 days ago2 answersMathematics#circle-area#pizza2answersPlates move a few centimetres a year, which is basically nothing - so why does all that pressure release in a single sudden jolt instead of smoothly?
MKMeher KapoorMentor6 h ago0 answersEarth Science#plate-tectonics#earthquakes0answersIn CH₄ + 2O₂ → CO₂ + 2H₂O, why is it 2 O₂ and not 1? I tried balancing it with just one and the atoms didn’t add up.
PHPranav HegdeHelper1 day ago1 answerChemistry#combustion#balancing-equations1answerEvery time there’s a question about which valve is on which side of the heart, I guess wrong. Is there a trick to remember tricuspid vs mitral?
SCSouvik ChatterjeeHelper2 days ago1 answerBiology#heart#valves1answerI know the heartbeat shows up as P-QRS-T on an ECG but I don’t actually know what each letter means. What’s the P wave?
ADAnwesha DasHelper3 days ago1 answerBiology#heart#ecg1answerMy textbook says a pH of 4 is 10 times more acidic than pH 5. That seems like a big jump for "just one number". Why is it like that?
DKDeepika KamathHelper3 days ago1 answerChemistry#acids-and-bases#ph1answerI get that the rocket pushes gas out the back and the gas pushes the rocket forward, but if the forces are equal and opposite, shouldn't they cancel out?
RPRudra PandeyHelper4 days ago1 answerPhysics#newtons-laws#forces1answerDoes Pythagoras’ theorem work for any triangle, or only right triangles? My friend tried it on a different triangle and got a weird answer.
KSKarthik SubramaniamMentor3 days ago1 answerMathematics#pythagoras-theorem#geometry1answerMy science book says the greenhouse effect keeps Earth warm enough for life, but the news always talks about it like a disaster. Which is it?
TBTrisha BoraHelper5 days ago1 answerEarth Science#greenhouse-effect#climate1answerWe covered mitosis in class but my older sibling mentioned meiosis too. Are they the same thing?
AMAnanya MishraMentor4 days ago1 answerBiology#mitosis#genetics1answerMy notes say both bubble sort and insertion sort are O(n²) in the worst case, but insertion sort seems to run faster in practice. Why?
DSDev ShahMentor5 days ago1 answerComputer Science#sorting-algorithms1answerWhy do all the elements in one column of the periodic table act kind of the same chemically?
CBChirag BhatMentor6 days ago1 answerChemistry#periodic-table1answerI noticed some highway curves are tilted. How do engineers figure out how much to tilt them?
MSManoj ShettyHelper5 days ago1 answerPhysics#circular-motion#banking1answerIf a bowling ball and a tennis ball are rolling at the same speed, does the bowling ball really have more kinetic energy?
ADAllan DiasHelper6 days ago1 answerPhysics#work-and-energy1answer