Formula 1 point A point sound source emits sound equally in all directions at the rate of \( 0.34 \mathrm{~J} / \mathrm{s} \). A nearby microphone has a surface with an area of \( 1.15 \mathrm{~cm}^{2} \) and is directed perpendicularly to the incoming sound wavefronts. The surface of the microphone is a distance of 3.03 m from the sound source. Find the average sound intensity that this microphone would measure (assuming it is perfectly accurate, and there is no background noise). Please express your answer in \( \mathrm{W} / \mathrm{m}^{2} \) and write it in scientific notation that is correct to exact 3 significant figures (as in, for instance \( 9.61^{*} 10^{\wedge}-3 \) ).

The brightness of a light bulb changes inversely with resistance and directly with voltage. What is the new resistance if a 60 -watt, 120 -volt bulb is used in place of a 100 -watt, 120 -volt bulb with 144 ohms?

Quesito 2D Una stecca colpisce una palla da biliardo di 250 g , inizialmente ferma, esercitando una forza media di 80 N per un tempo di 8 ms . Con quale velocita parte la palla dopo l'urto? Quesito 3D Un uotno spara in orizzontala

A child pulls a wagon with a force of 16 pounds. The handle of the wagon makes an angle of \( 60^{\circ} \) with the ground. Express the force vector \( F \) in terms of \( i \) and \( j \). \( F=(\square) i+(\square j \) (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

Cognome, classe, data Quesito 1A Un sistema è composto da due sfere a contatto su un piano orizzontale. Sfera 1: sfera omogenea di raggio 2 cm e massa 3 kg . Sfera 2: sfera omogenea di raggio 4 cm e massa 6 kg . Calcolare le coordinate del centro di massa.

3) Se sabe que la aceleración (a) se define como el cambio de la velocidad \( (v) \) en el tiempo (t), entonces \( a=\frac{d}{d t} v \), si la velocidad en cierto sistema está determinada por: \( v(t)=t^{2}-5 t \) a) ¿Cuál será el tiempo en el cual la velocidad es constante? \( v(t)=-S \)