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Question:

I REALLY need help with this one physics question please!?

A 3.20 multiplied by 102 kg piano is being lifted at a steady speed from ground level straight up to an apartment 10.0 m above the groundThe crane that is doing the lifting produces a steady power of 4.00 multiplied by 102 WHow much time does it take to lift the piano?how do i do this??Its the last question on my homework and i cant figure it out.

Answer:

So you are moving and now, who is supposed to know where you are and if you are okay? Like: who will know or check on you if you don't show up for work or school? Make sure your employer, your classmates, your school, has emergency contact info for youSo if you don't show when you should, they have someone to call.
A list of all your important phone numbers such as Mom! utilities, landlord, dial a nurse,a copy of your bank card and number to report it lost or stolen, a Multi fold important papers folder, birth certificates s/s card copies, car title, insurance policy emergency contact list, user ids and passwords to important sitesbasic cleaning supplies and some rags and towels and sheets and blankets, dishes pots pans a vacuum, and FOODand music, TV with Hi Def antenna you don't need cable yet,
Money everything else you should know if you are mature enough to move outThe one thing you must do is learn to think for your selfAsking questions here is not thinking for yourselfWe do not know you well enough to answer any moreThe rest of it is just a guess.
I'm going to guess that your numbers are in scientific notation, but just missing the ^ to indicate that things are a power of 10For example, 3.20 multiplied by 102 kg is probably 3.2010^2 kg, or 320kgThe crane power is then 4.0010^2 400wThe force to lift the piano is: F mg 3209.8 3136N The energy consumed is: E mgh 313610 31,360J The rate of energy input (or Power, P) is 400W, or J/s, and for a constant power input: E Pt t E/P 31,360/400 78.4 s

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