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One of the ways to improve your chances of success in icon designing is by asking questions. The more you are able to learn about how graphic design is done, the better equipped you'll be to create an attractive, effective advertorial or logo for your client. Icon designers often take on large jobs that require them to learn as much as possible about a client's business, products and culture. As such, they don't have all the time in the world to create an image that won't please their client - and they're often under deadlines. Icon designers don't need to know everything; they simply need to be able to identify and understand the essence of a brand or company. This requires a certain level of creativeness. The best way to demonstrate this creativity is to ask the designer to explain the most important shapes or objects associated with their client's product. Asking the designer to draw the same shape, colour or object in a different way to what you've...

In Newtonian mechanics, linear momentum , translational momentum , or simply momentum (pl. momenta) is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity (also a vector quantity), then the object's momentum is: p = m v . {\displaystyle \mathbf {p} =m\mathbf {v} .} In SI units, momentum is measured in kilogram meters per second (kg⋅m/s). Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force acting on it. Momentum depends on the frame of reference, but in any inertial frame it is a conserved quantity, meaning that if a closed system is not affected by external forces, its total linear momentum does not change. Momentum is also conserved in special relativity (with a modified formula) and, in a modified form, in electrodynamics, quantum mechanics, quantum field theory, and general rela...

Momentum is a vector quantity: it has both magnitude and direction. Since momentum has a direction, it can be used to predict the resulting direction and speed of motion of objects after they collide. Below, the basic properties of momentum are described in one dimension. The vector equations are almost identical to the scalar equations (see multiple dimensions). Single particle The momentum of a particle is conventionally represented by the letter p . It is the product of two quantities, the particle's mass (represented by the letter m ) and its velocity ( v ): p = m v . {\displaystyle p=mv.} The unit of momentum is the product of the units of mass and velocity. In SI units, if the mass is in kilograms and the velocity is in meters per second then the momentum is in kilogram meters per second (kg⋅m/s). In cgs units, if the mass is in grams and the velocity in centimeters per second, then the momentum is in gram centimeters per second (g⋅cm/s). Being a vector, momentum ...

Lorentz invariance Newtonian physics assumes that absolute time and space exist outside of any observer; this gives rise to Galilean invariance. It also results in a prediction that the speed of light can vary from one reference frame to another. This is contrary to observation. In the special theory of relativity, Einstein keeps the postulate that the equations of motion do not depend on the reference frame, but assumes that the speed of light c is invariant. As a result, position and time in two reference frames are related by the Lorentz transformation instead of the Galilean transformation. Consider, for example, one reference frame moving relative to another at velocity v in the x direction. The Galilean transformation gives the coordinates of the moving frame as t ′ = t x ′ = x − v t {\displaystyle {\begin{aligned}t'&=t\\x'&=x-vt\end{aligned}}} while the Lorentz transformation gives t ′ = γ ( t − ...