Discussion Questions Solutions ^hot^ — Physics Galaxy

When immersed in a medium with a refractive index closer to its own, a lens's converging power decreases, significantly increasing its focal length.

Speed refers to the rate at which an object covers distance, while velocity refers to the rate at which an object changes its position in a specific direction. physics galaxy discussion questions solutions

Potential (zero at infinity): V(x) = kQ/(x + a) − kQ/(x − a) = kQ[(x − a) − (x + a)]/[(x + a)(x − a)] = kQ(−2a)/(x^2 − a^2) = −2kQa/(x^2 − a^2). When immersed in a medium with a refractive

2→3: Isothermal at (T=2T_0). (P_3) from 3→1: isobaric ⇒ (P_3 = P_1 = P_0). At point 2: (P_2 = 2P_0, V_2 = V_0) ⇒ (nR(2T_0) = 2P_0 V_0) ⇒ (nRT_0 = P_0 V_0). At point 3: (P_3 = P_0, T_3 = 2T_0) ⇒ (V_3 = \fracnR(2T_0)P_0 = \frac2P_0 V_0P_0 = 2V_0). 2→3: Isothermal at (T=2T_0)

Short (6–7 min) videos where standard illustrations and solutions are solved within the lecture to build conceptual strength.

Using tidal forces, explain how two spiral galaxies can become an elliptical galaxy. Hint: Consider energy randomization and violent relaxation.

The tiny SMBH is a power plant not because of its size, but because accretion extracts gravitational energy with extreme efficiency, limited only by the Eddington luminosity.