سفينة على سطح الماء ترسل اشارة صوتية عموديا الى قعر الماء تستلم هذه الاشارة بعد 4 ثواني فما هو عمق القعر اذا علمت ان سرعة الصوت في الماء هي 1500متر / ثانية

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

Ajoint produces movement when its angle decreases. which type of movement is it?

Forms of meditation hail from which traditions a ) eastern traditions b ) western traditions c ) eastern and western traditions d ) neither eastern nor western traditions