题目
题目

AST 1001 (120) 实验室 F：预实验

判断题

对还是错：能量可以被创造。

查看解析

查看解析

标准答案
Please login to view
思路分析
原题提出的是一个判断题，内容为：对还是错：能量可以被创造。 首先，我们需要明确能量的物理定义与守恒定律。在经典物理学中，能量是物体或系统所具有的做功的能力，存在多种形式如动能、势能、热能、化学能等，这些形式之间可以转化，但总量在孤立系统内保持不变。 ......Login to view full explanation

登录即可查看完整答案

我们收录了全球超50000道考试原题与详细解析,现在登录,立即获得答案。

类似问题

Challenge Problem: A wrecking ball is suspended from a 14 m long cable that makes a 360 angle with the vertical. The ball is released and swings down. What is the ball’s speed at the lowest point (g = 9.81ms-2) ? Hint: GPEmax = KEmax, you will also need to use trigonometry to help you solve this problem. Answer to 1 decimal place and only put in the numerical value. Do not write the unit in your answer.  This is a short-answer question. Show all working on paper, including the relevant equations and units.

What should the height of a slide in a park be so that a child will reach the bottom of the slide with a speed of 15.0 m/s? Use g = 10.0 m/s2.

A simple pendulum of length 2.00 m is made with a mass of 2.00 kg.  The mass has a speed of 3.00 m/s when the pendulum is 30.0° above its lowest position.  What is the maximum angle (in degrees) away from the lowest position the pendulum will reach?

A ball can be rolled down one of four different ramps, as shown below. The final elevation loss of each of the ramps is the same. Neglecting friction, for which ramp will the speed of the ball be the highest at the bottom?

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！