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 \( 9.61^{*} 10^{\wedge}-3 \) ).

¿Cuál es la relación entre distancia y tiempo cuando se calcula la velocidad promedio? a. Se usa el incremento en el tiempo, pero la distancia se usa de forma constante. b. Representa la razón del incremento de la distancia respecto al incremento en el tiempo. c. Se considera que los dos conceptos no presentan cambios, son constantes. d. Se utiliza el incremento en la distancia y el tiempo se emplea de forma constante.

¿Qué fórmula corresponde a la constante de Coulomb? (a) \( k=\frac{1}{\pi \epsilon_{0}}=19 \times 10^{9} \frac{\mathrm{~N}}{\mathrm{C}^{2}} \) (b) \( k=\frac{1}{4 \pi \epsilon_{0}}=9 \times 10^{9} \frac{\mathrm{Nm}}{\mathrm{C}^{2}} \) (C) \( k=\frac{1}{4 \pi \epsilon_{0}}=19 \times 10^{9} \frac{\mathrm{Nm}^{2}}{\mathrm{C}^{2}} \)

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?

¿Qué describe la ley de Coulomb propuesta por el fisico francés Charles Augustin de Coulomb para el año de 1785 ?

The force needed to keep a car from skidding on a curve varies Inversely as the radius of the curve and jointly as the weight of th car's speed. Suppose that 200 pounds of force keeps a 3200 -pound car from skidding on a curve of radius 400 ft at 25 mph . What car from skidding on a curve of radius 550 ft at 55 mph ? pounds of force