...离与物理距离的表格形式 6. 摘要 什么是遗传距离(genetic distance)? Genetic distance is the measure of the genetic divergence between species or populati***. This distance is measured using ancestral relati***hips and evolutionary patterns. The similarity between genes is importan...
什么是距离(distance)? 距离被定义为一个标量,也就是说,它忽略方向,只与大小或大小有关。它是点之间的间隔,描述了两个或多个点之间实际覆盖了多少地面。总距离将通过将所有间隔相加来计算。 与矢量值不同,距离从...
...a vector quantity. The magnitude (size) of this vector quantity gives the distance. If the displacement vector , then the magnitude is given by . In the earlier example, we had a displacement vector of . The magnitude of this vector is .
...用它们来解决沿直线运动的物体的简单运动问题。 距离(distance)和取代(displacement)的区别 Distance is the total length of the path traveled by an object. This is a scalar quantity. Displacement () is the shortest distance between the object’s starting point and the fina...
在学习如何计算向心力之前,让我们先看看什么是向心力,它是如何导出的。在圆形路径中移动的物体即使保持恒定速度也在加速。这种物体所经历的加速度称为向心加速度,它总是指向圆轨迹的中心。根据牛顿第二定...
... is also . Since we’re c***idering a very **all interval of time, the distance traveled by the object during time is almost a straight line. This distance, along with the radii, is shown on the red triangle. The blue triangle of velocity vectors and the red triangle of lengths are similar t...
...d of the object (sometimes referred to as “linear speed”) is still the distance that the object travels per unit time. If the object travels through a length along the circumference of the circle during a time , then the speed of the object is, Since , we can write, Since , we can write...
在这里,我们将看看如何解决动量问题,在一维和二维使用守恒定律的线性动量。根据这个定律,只要没有外力作用,粒子系统的总动量就保持不变。因此,解决动量问题需要计算系统在相互作用前后的总动量,并将两...
...ct from a position to another position is given by, So if a force vs. distance graph is drawn, the work done to move the object from to is equal to the area under that graph between and . How to Calculate Work Done – Force vs Distance Graph 如前所述,所做的功不是矢量量。...
在本文中,我们将研究如何计算动能。动能是物体运动所产生的能量,它取决于物体的速度和质量。物体的运动方向对动能没有影响。对于一个运动的物体,动能被定义为使物体从静止加速到它的速度所需要做的净功。...