Sarah

I got my tattoo about a month and a week ago, and it is still raised. I can feel the tattoo when I touch it. It is not red or itchy or anything that would assume infection. I wash it like every other day just once, not sure if washing it more would help. It seems to be healed but just still raised. Is this normal, should I be worried?

Thank You

Suppose your car carries a charge of 70 μC . What current does it produce as it travels from Dallas to Fort Worth (35 mi) in 0.80 h? Not quite sure how to do this please help!

11.8 mL of 0.3M HCl is added to a 122mL sample of 0.21 M HNO2 (Ka for HNO2=4.0x10^-4). What is the equilibrium concentration of NO2- ions? I have no idea how do this please help.

Calculate the pH of a solution made by mixing 49.5mL of 0.335 M NaA (Ka for HA = 1.0 x 10 ^-9) with 30.6 mL of 0.12 M HCl? I have no idea how to do this please help me!

Calculate the solubility of Ag2SO4 [Ksp = 1.2 x 10^-5] in a 2.0M AgNO3 solution???

I have no idea how to solve this

1.Three balls are attached to a light rigid rod, as shown in the figure. A fulcrum is located at xf = 19.0 cm measured from the left end of the rod. Ball A has mass mA = 40 g and is located at xA = 3 cm. Ball B has mass mB = 15 g located at xB = 22 cm. Ball C has mass mC = 24 g located at xC = 37 cm. Calculate the x-coordinate of the center of mass XCM. Assume that the mass of the rod is small enough to be ignored in your calculation. Your answers should be accurate to within 0.1 cm

the photo is just a rod with a fulcrum located near the center but more towards the left. Ball A is further left than the fulcrum. Ball B and Ball C are further right than the fulcrum with ball B closer to the fulcrum. All the length measurements are measured from the left of the rod

2. In Part 1 above, is the structure in balance? If not, how far must the fulcrum be moved so that it becomes in balance? (Answer "0.0" if it does not need to be moved. Also, signs matter: + if to the right, – if to the left.)

V(pred) = 1.14 m/s

Assume that the standard deviation in a collection of similar measurements to the one shown in the figure were σW = 0.085 J for the work W done by the rubber band. Given this uncertainty, calculate the uncertainty for the predicted speed.

mass is 1.26 kg

Please give me the formula you used to solve for σv