Is the following sentence true or false ? in the modern periodic table, elements are arranged by increasing number of protons

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

What happens when a rubber rod is rubbed with a piece of fur?