:v=:ρ=______(变形:m=____;v=______)。:G=______(变形:m=_______):P=______ (变形:S=_____;F=_____)液体压强公式:P=______ :F浮=________(称重法F浮=________)6杠杆的平衡条件::F=_________S==____=:P=_________==:Q=_______;:Q放=_____(变形:q=_____;m=_______):I=____(变形公式:U=_____R=_______):W=________=_________电功率:P=_________=(焦耳定律):Q=:W=________=_________=_________=________P=_________=__________=_________=:波长λ、波速C与频率f的关系:C=_____________________
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