A. scale B. ruler C. thermometer D. magnet 相关知识点: 试题来源: 解析 A。选项 A“scale”是天平,可以用来测量物体的质量;选项 B“ruler”是尺子,用来测量长度;选项 C“thermometer”是温度计,用来测量温度;选项 D“magnet”是磁铁。反馈 收藏 ...
百度试题 结果1 题目 An object with a mass of 5kg is moving at a constant velocity of 10m/s. What is the net force acting on the object? A. 10N B. 20N C. 30N D. 0N 相关知识点: 试题来源: 解析 D 反馈 收藏
An object with mass 3M is launched straight up. When it reaches its maximum height, a small explosion breaks the object into two pieces with masses M and 2M. The explosion provides an impulse to each object in the horizontal direction onl...
结果1 题目 The mass of an object is multiplied by the speed of light squared, ___ other words , the speed of light is multiplied by itself. A. by B. for C. in D. with 相关知识点: 试题来源: 解析 C 满分:2.5 分 正确答案:C 反馈 收藏 ...
The mass of an object is measured in ___. A. newtons B. joules C. kilograms D. watts 相关知识点: 试题来源: 解析 C。解析:质量的单位是千克(kilograms)。选项 A“newtons”是力的单位;选项 B“joules”是能量单位;选项 D“watts”是功率单位。反馈...
Those questions are all concern with the theory of relativity!1:No,we can use this equation only when the object is in low speed.不,只有当物体以低速运动时才能使用这个问题.2:Yes,it is different! The mass is bigger when the pan is hot.someone thinks mass is constant,but according to the...
When measuring the mass of an object with a balance, what should be done first? A. Putting the object on the balance pan directly. B. Adjusting the balance to make the pointer point to the zero mark. C. Recording the reading immediately. D. Ignoring the balance and using an E. ...
The mass of an object is multiplied by the speed of light squared, ___ other words , the speed of light is multiplied by itself. A. by B. for C. in D. with 相关知识点: 试题来源: 解析 C 结果一 题目 66. The mass of an object is multiplied by the speed of light squared...
An object of mass m1 hangs from a string that passes over a very light pulley P1 as shown in the figure.The string connects to a second very light pulley P2.A second string passes around this pulley with one end attached to a wall and the other to an object of mass m2 on a ...
The lift is moving upwards but is slowing down. The tension in the string is A A less than mg B 6exactly mg C greater than mg Dzero 相关知识点: 试题来源: 解析 AMoving upwards take up at positiveT-W=ma=-ve since lift is decelerating 反馈 收藏 ...