Titan is smaller in mass and somewhat larger in size than the planet Mercury. How can Titan keep a substantial atmosphere while Mercury is virtually airless?
What will be an ideal response?
Titan is so cold that its gas molecules do not travel fast enough to escape.
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While Saturn is almost as large as Jupiter, its mass is only about ________ of Jupiter's
Fill in the blank(s) with correct word
Two wires, each having a weight per unit length of 1.0 × 10?4 N/m, are strung parallel, one 0.10 m above the other. If the wires carry the same current, though in opposite directions, how great must the current in each wire be for the magnetic field of the lower conductor to balance the weight of the upper conductor?
What will be an ideal response?
The distance between the object and the eyepiece of a compound microscope is 18.0 cm. The focal length of its objective lens is 0.80 cm
and the eyepiece has a focal length of 2.3 cm. The near-point distance of the person using the microscope is 25.0 cm. What is the total overall magnification of the microscope? A) -120 x B) -184 x C) -200 x D) -360 x E) -480 x
Earth observes a rocket move away at 0.370c. The rocket is designed to launch a projectile at 0.505c relative to the rocket
(a) Fired straight ahead, what is the projectile speed observed from Earth? (b) Launched to the rear, what is the projectile speed observed from Earth?