Recent content by utkarsh5

thanks for the replies!what confused me was exactly that the author had not used watts/(meter^2),and had used just watts.that was pretty strange.anyways,thanks for the clarification! :D

the centripetal force acts in the direction of centre of the circle in which the the object is moving.in this case,it would be the center of the horizontal circle on which the car moves. so,the centripetal force is not acting parallel to the surface,but instead,horizontally.

i was trying to verify the '8 years 7 months 6 days' myth/fact that states that you would have you scream for that much time to produce enough energy to warm up a cup of coffee. i assume that an average human screams at 80 dB.if i have to calculate the power,do i have to take the area of mouth...

thank you for the answers!

COB-centre of balance COG-centre of gravity

i think i get it now.the torqques on both sides of the fulcrum cancel out each other.this is very much similar to all the torques balancing each other about the centre of gravity.are the COB and the COG same thing?if they are,then can centre of gravity have interesting practical applications...

why is it easier to "throw" someone with a judo throw? in judo,when we throw out opponents,the effort needed to throw them is significantly less then what one would expect.it is easier to throw a person with a judo throw than normally picking them up,moving them to the same distance,and then...

thank you for your answers!now i understand the concept!thank you!

when we tie a stone to a string and spin it,it does not seem to fall.why does it happen?i mean to say that,no matter how great its horizontal velocity and centripetal force is,the vertical component of the acceleration won't be affected.it means that the stone should keep falling no matter how...

i just tested my theory.i spread some rice across the dish and left a little circle (or hole for that matter) in the middle.the hot air would still show it's effect,which happened.the rice did not get colder in the middle

similarly,in the case of ice-cream,a cold "pocket" of air should be formed(due to colder air being denser and settling down),while the sides aren't protected as much.this could be a possible explanation,but i already see holes in it.

is it possible that the rising hot air from the whole dish creates a column of hot air preventing cold air from coming,while the cold air enters from sides colling down the sides.

thank you for answering!what confuses me though is why is there a higher gradient between air and food on the edge when compared to middle

thank you for answering! it seems that the food getting cooler and and ice-cream getting hotter are the same phenomena

i noticed that when food is spread in a plate dish and kept to cool,it cools down in the sides first and then in the middle.why is it so?is it because of the contact with edges of the dish?or is it due to the contact with air?please exaplain(it works with semi-solid food and with rice...