Velocity, quantity that designates how fast and in what direction a point is moving. A point always moves in a direction that is tangent to its path; for a circular path, for example, its direction at any instant is perpendicular to a line from the point
题目9 Which physical quantity is a vector?A massB densityC temperatureD velocity 相关知识点: 试题来源: 解析 速度是一个矢量,因为它既有大小,又有方向。所以答案是D。 矢量是既有大小又有方向的物理量。 - 质量只有大小,没有方向。 - 密度只有大小,没有方向。 - 温度只有大小,没有方向。 - 速度既有...
The instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of x with respect to t: $$v(t)=\frac{d}{dt}x(t).$$ Like average velocity, instantaneous velocity is a vector with dimension of length per time. The in...
aThis is the mail system at host cmhqproxy1.chinamobile.com. 这是邮件系统在主人cmhqproxy1.chinamobile.com。[translate] a我很抱歉我这周不能来看你 I was sorry very much my this week cannot come to see you[translate] aVelocity vector 速度传染媒介[translate]...
Climate change velocity is a vector depiction of the rate of climate displacement used for assessing climate change impacts. Interpreting velocity requires an assumption that climate trajectory length is proportional to climate change exposure; longer paths suggest greater exposure. However, distance is an...
a还有冰川的融化造成环境污染 正在翻译,请等待...[translate] ai want to ride around west lake 我想要在西部湖附近乘坐[translate] av is a vector that contains the velocity for each vector of x v是包含速度为x每传染媒介的传染媒介[translate]...
acountry of domicile 住处国家[translate] aThe vector C is usually called the velocity of B relative to A, although, strictly speaking,it is meaningless to talk of a velocity relative to a point. 传染媒介C通常叫速度B相对A,虽然,严格上讲,它是无意义的对速度的谈话相对点。[translate]...
The difference in the center wavelengths of the orthogonal polarization components is a typical feature of group-velocity-locked vector solitons9. The two coupled solitons experience a center wavelength shift through self-phase and cross-phase modulation to compensate for the group-velocity difference ...
The velocity vector field of flow inside the reactors with different threads.Pouyan, TalebizadehHassan, RahimzadehMeisam, BabaieSaeed, Javadi AnaghiziHamidreza, GhomiGoodarz, AhmadiRichard, Brown
Because of this, wavefront curvature is thought to be an important functional mechanism of cardiac arrhythmias. However, the curvature of wavefronts during an arrhythmia are generally unknown. We introduce a robust, automated method to measure the curvature vector field of discretely characterized, ...