2-Una rana en un recipiente semiesférico vacío flota sin hundirse, a ras del agua de mar \( \left(\mathrm{Pe}=1,35 \mathrm{gf} / \mathrm{cm}^{3}\right) \). Si el recipiente tiene un radio de 6 cm y un peso despreciable, determinar cuál es el peso de la rana. (Volumen de la esfera \( =4 / 3 \times \pi \times \mathrm{r}^{3} \) ) a- \( 1,1221 \mathrm{kgf} \quad \mathrm{b}-2,442 \mathrm{kgf} \quad \mathrm{c}-122,17 \mathrm{gf} \quad \mathrm{d}-610,7 \mathrm{gf} \) e-Ninguna es correcta

Julia lifts a raw egg and drops it from a height of 6.2 ft . After 0.25 s , the egg is falling at a speed of \( 2.45 \mathrm{~m} / \mathrm{s} \). After 0.50 s, the egg is falling at \( 4.90 \mathrm{~m} / \mathrm{s} \). a. Drop two objects side by side at the same time. Be careful. Make sure neither one will get affected by the air much, but make them significantly different weights. Maybe a small rock and your friend's phone. Make sure the bottoms start at the same height above the ground so they fall the same distance. Make sure you release them at the same time. (If you just THINK about this, you will be making the age-old mistake of trusting your guess/intuition without experimental validation.) Within experimental consistency, do they hit at significantly different times? (Repeat as needed to be sure.) b. Sketch and label the process described for the egg. (Three states!) c. What information is "implied"? What is "red herring" info.? d. Did the egg pick up more speed in the second 0.25 s than the first? Why? Would the egg travel farther the first 0.25 s or the second? Why?

3. Arus listrik 200 mA mengalir selama 4 menit, berapakan muatan listrik yang mengalir ?

4. จากรูป จงคำนวณหาความหนืดพลวัต และความหนืดเปรียบเทียบ เมื่อ \[ \begin{aligned} \rho \text { ของเหลว } & =910 \mathrm{~kg} / \mathrm{m}^{3} \\ \mathrm{~A} & =0.5 \mathrm{~m}^{2}\end{aligned} \]

1) Dos diminutas esferas metálicas inicialmente portan cargas \( Q_{1}=+10 \mathrm{mC} \) y \( Q_{2}=-5 \mathrm{mC} \). Si ambas esferas se ponen en contacto y posteriormente se separan por una distancia de 1 m , ¿cuál es el módulo de la fuerza que experimentan? a) 36000 b) 2250 c) 9000 d) 56250 e) 20250

1. Jika dalam suatu penghantar mengalir muatan listrik sebesar \( 6 \times 10-2 \mathrm{C} \) selama 30 s . Berapakah kuat arus listrik yang mengalir dalam penghantar itu ?