Thursday
April 24, 2014

Posts by blasting


Total # Posts: 32

physics
if each parallel conducting plates have area 1, then another area 2 is added to each plates, if i look at this formula Q=CV=epsilon(A1+A2)V/d, then shouldnt charge increases then charge density also increases

physics
if each parallel conducting plates have area 1, then another area 2 is added to each plates, if i look at this formula Q=CV=epsilon(A1+A2)V/d, then shouldnt charge increases then charge density also increases

physics
if i look at this formula Q=CV=epsilon(A1+A2)V/d, then shouldnt charge increases then charge density also increases

physics
if each parallel conducting plates have area 1, then another area 2 is added to each plates, is the charge density and charge still be the same

physics
if i increase the distance between the parallel conducting plates, potential difference going to increase but what about electric field?

physics(check my answers)
a large thin conducting plate has a net charge q. the charge density on each side of conducting plate is : q/2A electric field on each side is :q/2epsilon=q/4Aepsilon Does the charge on the right surface contribute to the electric field to the left of the plate?

physics
so if a capacitor is connected in series with a resistance. Then if one side of capacitor is connected to a positive terminal. Then does that mean that plate has to be positive charge. The electrons travel from the positive plate around the loop to the negative side?

physics
does current flows from high potential to low potential since it flows from positive terminal to negative terminal

physcis
can we only have uniform electric field in flux only

physics
does flux depends on electric field or just the enclosed charges only

physics
is electric field always positive?

physics
One end of a cord is fixed and a small 0.610 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m as shown in the figure below. When θ = 18.0°, the speed of the object is 4.50 m/s. At this instant, find each of the...

chemistry
When 0.667 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 108C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. what is the molar heat of reaction, H rxn, for the r...

chemistry
When 0.949 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 389C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. what is molar heat of reaction, Hrxn, for the reaction of...

chemistry
the question is to find the molar heat of reaction of Ca(s) + 2H+(aq)= Ca2+(aq) + H2(g) (i dont know how to do the arrow so im just gonna use the = sign)

chemistry
When 0.667 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 108C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...

chemistry
Which of the following is the formation reaction for CaO(s) ? can you check my answer(the one that has star next to it) A. Ca(s) + 1/2O2(g)= CaO(s). B. CaO(s)= Ca(s) + 1/2O2(g) C. Ca2+(aq) + O2–(aq)= CaO(s) D. 2 Ca(s) + O2(g)= 2CaO(s) (*) E. 2 CaO(s)= 2 Ca(s) + O2(g)

chemistry
how do i calculate the volume of a unit cell and volume of atoms within a unit cell for FCC and BCC

chemistry
if i mix 15ml of ethanol and 5ml of water into 20ml vol flask. Mass of flask with solution is 50g and mass of empty flask is 40g. How do i calculate the density of ethanol and density of water separately

chemistry
Complete and balance the chemical equation using compound formulas. Include the states. If there is no reaction, enter NR. Pb(NO3)2(aq) + NaI(aq) → sine Pb is not reactive, the reaction is NR. Am i correct?

chemistry
The reaction of aqueous barium bromide and aqueous lithium carbonate is represented by the balanced net ionic equation. Ba2+(aq) + CO32-(aq) → BaCO3(s) Give the balanced formula equation for the reaction. Include the states.

chemistry
for face centered unit cell, r=6 find edge in terms of r, face diagonal in terms of r, body diagonal in terms of r, edge=squareroot(8)r face=4r but i dont know how to find body diagonal

chemistry
what is the type of packing for body centered unit cell? i put A-B-A-B but my answer is wrong

chemistry
Balance the equation: SO2 + NO2 → SO3 + NO im confused, isnt this already balanced since both sides have equal number of atoms

chemistry
sorry for double posting, i forgot to include number 2

chemistry
1)The element nickel has ccp packing with a face-centered cubic unit cell. The density of nickel is 8900 kg/m3 and the cell volume is 4.376 x 10-23 cm3. Calculate the value of Avogadro's number to three significant figures based on these data. (Note: the value may differ f...

chemistry
is it always 4 atoms in a unit cell

chemistry
1)The element nickel has ccp packing with a face-centered cubic unit cell. The density of nickel is 8900 kg/m3 and the cell volume is 4.376 x 10-23 cm3. Calculate the value of Avogadro's number to three significant figures based on these data. (Note: the value may differ f...

chemistry
why does the enthalpy of formation for the ethanol dimer have more energy than two isolated ethanol molecules? is it because there is a bond between the hydrogen of ethanol dimer

chemistry
its a fill in the blanks

chemistry
can you check my answers in the parenthesis 1)The molecular structure around the oxygen in water is (bent) 2)The molecular structure around all the carbons in ethanol is (tetrahedral)

chemistry
how do you write the balanced chemical equation of Fe3+-ASA

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