Recent content by phat2107

Thanks that makes it clearer

I was reading in my chemistry textbook that lettuce gets crisper when soaked in water and wilts quickly when drenched in vinegar. Can someone explain this to me, the book does not give a clear reason as to why this happens.

Homework Statement "A 1.60 g sample of a mixture of naphtalene, C10H8. and anthracene, c14H10 is dissolveed in 20.0g of benzene, C6H6. The freezing point of the solution is 2.81C. Pure Benzene freezes at 5.51C and has a Kf = 5.12C kg/mol. Determine the composition (mass percentage) of...

Homework Statement A block attached to a spring is displaced from equilibrium to the position x = +4.9 m and released. The period is 0.5 s . At what positions and times during the first complete cycle do the following condition occur: | v | = 0.5 v_{max}, Where v_{max} is the maximum speed...

if what you said is true, than for some reason my answer of 16/3 isn't correct (its online so i get my answers right away if i am correct) i still don't get what's wrong... a little more insight will be greatly appreciated

Homework Statement A street light is at the top of a 18 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole? Homework Equations...

understood, the car example made it clear thanks

"A particle moves along a straight line and its position at time t is given by s(t)= 2t^3 - 15 t^2 + 24 t"

Homework Statement what is the total distance traveled from time 0 - 10 the equations is 2t^3-15t^2+24t Homework Equations The Attempt at a Solution time 0 it is at 0 time 10 its at 740 the answer is not 740 i have no idea how to solve this equation, no clue as to what...

The teacher asked for fractions, so my mistake as putting it as an integer sorry.. I get how to get what tan(x) is but i don't understand how to find the fraction or what the fraction looks like the cos one worked, ( i can check online if i got the right answer and i did) but tan is...

Homework Statement If sin (x) = -6/7 what is cos(x) = ? what is tan(x) = ? the answers have to be in integer form, as in no decimals. the "x" is supposed to be in quadrant 3 2. The attempt at a solution This is in radians so i did sin^-1 (-6/7) = -1.02969 the answer I am...