Recent content by SDTK

thank you

thank you

Copper pennies were placed into HCl which had been diluted with an unknown quantity of water. The pennies look cleaner, ... remain un-corroded (as expected). There is a slight bit of gas being produced , with no smell, but can cause discomfort to eyes. Bubbles formed on the pennies for the...

thanks your comments are very helpful :-)

No, ... don't have anything that strong sitting around, but I may quote your frog comment to my students :-)

Thank you. This helps! If I have a very strong magnet, could I possibly use it to attract a US nickle? ( The coins are 75% copper, 25% nickle)

I am putting together a hands on activity for ninth graders, which will include testing different materials to determine whether they are attracted to a magnet. I have collected fasteners (screws, nails, bolts), and surprised that the fasteners I purchased labeled "zinc" are attracted to the...

:-) thank you, for both the comments regarding the question, and the suggestion to check out diamagnetism.

Homework Statement A Neutral copper Rod, a polarized insulator rod, and a bar magnet are arranged around a current-carrying wire. Will the neutral copper rod, polarized insulator, and magnet remain stationary?Homework Equations does the electric field of the current carrying wire have an...

Should angle θ be "0" because the force applied is parallel to the angle of the ramp? W =F d cos(θ) = 500 kg 4 m cos(0) = 2000 J , work done on crate

thank you

Homework Statement Calculate work done by an 85 kg man who pushes a crate 4.00 m up a ramp at an angle 20 degrees to horizontal. He exerts a force of 500N on the crate parallel to the ramp, and moves at constant speed. Include the work that he does on the crate and on his body to get up the...

thank you! :-)

Homework Statement this is a question just to help with my understanding: ... when Torque (kg m^2/s^2) and the Moment of Inertia (kg m^2) are known and used to find angular acceleration, ... T(net)/I, are the units for the resulting acceleration rad/s^2 Thanks :-) Homework Equations...

@gneill, @haruspex, @ObjectivelyRational, @TomHart; Thank you all for the help! I understand how to do this now. :oldsmile::biggrin: :oldsmile: