يتم سحب حلقة سلكية مستطيلة عرضها w=3.1cm وعمقها d=4.8cm من الفجوة بين مغناطيسين دائميين . يوجد مجال مغناطيسي مقداره B=0.073T في كل
مكان في الفجوة . إذا تمت إزالة الحلقة بسرعة ثابتة تبلغ 1.6cm/s فأوجد الجهد المستحث في الحلقة كدالة زمن ؟
Àvind=?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant