How do most of the newly discovered solar systems and planets compare to our own?
What will be an ideal response?
So far we have detected mostly large, massive jovian planets, and many of these planets have revolved very close to their home star, often at less than Mercury's distance from the Sun. This is probably a selection effect, with Doppler studies picking up massive, fast moving planets best.
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You can be certain that a collision between two objects is elastic if
A. The system’s total momentum is conserved. B. The system’s total energy is conserved. C. The system’s total kinetic energy is conserved. D. If the objects are bouncy or springy. E. If the objects stick together after the collision.
A star may undergo two or more red giant expansion stages
Indicate whether the statement is true or false
What does the phenomenon of diffraction demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of atomic orbitals D) the particle nature of the photon E) the process of ionization
A point charge (?5.0 ?C) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 ?C) is placed on the x axis at x = ?4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 ?C) placed on the y axis at y = 3.0 cm?
a. 90 N b. 45 N c. 54 N d. 72 N e. 36 N