Exoplanetary systems containing "hot Jupiters"—extremely massive planets orbiting very close to their parent stars—do not look like our own solar system. Are they inconsistent with the condensation theory of solar system formation? Explain
What will be an ideal response?
The existence of hot Jupiters is not at all inconsistent with the condensation theory; the process can easily deposit large planets in orbit very close to the parent star, without necessarily precluding the formation of Earthlike planets further away. Friction between the planets and the nebula may have caused the hot Jupiters' orbits to decay quickly.
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An electromagnetic wave propagates along the +y direction as shown in the figure. If the electric field at the origin is along the +z direction, what is the direction of the magnetic field?
A) +z B) -z C) +y D) +x E) -x
The range of wavelengths for the "water hole" is ________ cm
Fill in the blank(s) with correct word
The maximum torque on a flat current-carrying loop occurs when the angle between the plane of the loop's area and the magnetic field vector is
A) 0°. B) 45°. C) 90°. D) 135°.
A rocket with an initial mass of 1000 kg adjusts its thrust by varying the rate at which mass is ejected. The ejection speed relative to the rocket is 40 km/s. If the acceleration of the rocket is to have a magnitude of 20 m/s2 at an instant when its mass is 80% of the original mass, at what rate is mass being ejected at that instant? Ignore any external forces on the rocket
a. 0.40 kg/s b. 0.50 kg/s c. 0.60 kg/s d. 0.70 kg/s e. 0.80 kg/s