Homework Statement
1. suppose that your calculator requires .20mA to operate and will be on for 20min while you solve this problem. What quantity of charge will flow during this time? I got 2.4x10^ -2
2. If the potential difference across the nerve of a frog is 85mV and its resistance is...
1. If the potential difference across the nerve of a frog is 85mV and its resistance is 2.5x10^2 Ω what current will flow through the nerve? Answer: 3.4x10^ -4
2.If all other factors remained the same, what change in resistance would result if the radius of a wire were doubled? Answer...
Tomorrow is my test and i understand partially everything... and than i stumbled upon these two questions and if i just know what's used for each formula .. i can do it
1) Calculate the amount of energy required to evaporate an ice cube having a mass of 45g.
I know that first it must go...
In this lab we saw the reaction of lead (II) nitrate with potassium iodide to form a lead (II) iodide precipitate and aqueous potassium nitrate.
Pb(NO3)2 + 2KI ----> PbI2 + 2KNO3(aq)
There was 3.31 grams Lead Nitrate, 1.66 grams Potassium Iodide, and 0.48 grams lead (II) iodide...
d) i got 22m/s
e)Mmech=(.2)(9.8)(25)+1/2(.2)(22)^2
=97.4 J
o my gosh.. i know i bugged you soo much but seriously without your help i wouldn't have got it.. THANKS ALOT:)
just the last two... did you get the same?
ok so for b) i got 2371.6J
but for c) how do we change initial energy to potentional energy..
Thanks again for ur response... i greatly appreciate it:D
Homework Statement
A bridge is 25 m above a road below. If a .20kg stone is thrown upward from the bridge at 22.0m/s, calculate:
a) the gravitational energy of the stone as it is thrown upwar
b) the kinetic energy of the stone as it is thrown up
c) the maximum height (above the ground)...
Im doing a lab about acceleration due to gravity.
And one of the things we had to do is make a a-t graph using the Aave and Ttotal.
Interval ∆t Ttotal ∆d Dtotal Vave ∆v Aave(cm/s^2)
1 0.050 0.050 2.0 2.0 40 - -
2 0.050 .100 4.0 6.0 80 40 800
3 0.050...