×
单选题
能量永远不会产生或消失，这是一条物理定律。它只是从一种能量变成了另一种能量。在我们的例子中，动能在刹车时转变为热能。
A
Energy is never created or lost, it＇s a physics law that it just changes from one kind of energy to another and in our case, motion energy turns into heat energy when we brake
B
It is a law of physics that energy is never produced or destroyed. It just changes from one type of energy into another type. In our example the kinetic energy changes into heat energy during braking.
C
Energy is never produced or lost, it＇s a physical law that it just transfers from one kind of energy to another and in our case, moving energy turns into heat energy when braking.
答案解析
正确答案：B
相关知识点：
能量转换物理定律考点
题目纠错
相关题目
单选题
Operate the elevator in the full travel 6 times.
单选题
Supply hydraulic power to system B with the pump.
单选题
Turn the clamps to free the pipes.
单选题
Torque the bolts to the force between 0.56 and 0.60 m.daN.
单选题
This specification will meet the applicable government regulatory requirements.
单选题
Vertical pages rather than horizontal are preferred for all types of publication.
单选题
Those instructions are necessary to carry out the scheduled servicing.
单选题
Future reference to the unit may be by abbreviation.
单选题
If the probes touch each other, they can become demagnetized.
单选题
Remove the four screws that attach the flange to the cover.
