天津耀华中学2025届高三上期第一次月考物理试题
天津市耀华中学2025届高三年级第一次月考物理试卷一、单项选择题(每小题5分,共25分)1.分子间作用力F、分子势能与分子间距离r的关系图线如图甲、乙两条曲线所示(取无穷远处分子势能)。下列说法正确的是( )A.甲图线为分子势能与分子间距离的关系图线B.当时,随距离增大,分子间作用力做正功C.当时,分子间作用力表现为引力D.随着分子间距离从接近于零开始增大到无穷远,分子间作用力先减小后增大2.如图所示,滑轮固定在天花板上,细绳跨过滑轮连接物体和,物体静止于水平地面上,用和分别表示地面对物体的摩擦力和支持力,现将物体向左移动一小段距离,仍静止,下列说法正确的是()A.和都减小B.和都增大C.增...
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