What can we conclude when we see a region of a planet that is not as heavily cratered as other regions?
A) There is little volcanic activity to create craters.
B) The planet is rotating very slowly and only one side was hit by impactors.
C) The planet formed after the age of bombardment and missed out on getting hit by leftover planetesimals.
D) The surface in the region is older than the surface in more heavily cratered regions.
E) The surface in the region is younger than the surface in more heavily cratered regions.
E) The surface in the region is younger than the surface in more heavily cratered regions.
You might also like to view...
Consider the circuit below. Switch S is closed at t = 0
What is the current through the capacitor
C just after the switch is closed?
Which of the following best explains why many jovian moons have been more geologically active than the Moon or Mercury?
A) Jovian moons are made mostly of ice that can melt or deform at lower temperatures than can the rock and metal that make up the Moon and Mercury. B) The jovian moons are considerably larger than the Moon and Mercury and therefore have retained much more internal heat. C) The jovian moons probably have far more internal heat generated by radioactive decay than do the Moon or Mercury. D) Because of their greater distances from the Sun, the jovian moons receive much less heat from the Sun.
A rectangular coil of 100 turns measures 40.0 cm by 20.0 cm. This coil is placed next to an electromagnet which is switched on, increasing the magnetic field through the coil from zero to 0.800 T in 50.0 ms. If the resistance of the coil is 2.0 ohms, what are the induced voltage and current in the coil?
Constant Acceleration Kinematics: Acceleration is sometimes expressed in multiples of g, where g = 9.8 m/s2 is the acceleration of an object due to the earth's gravity. In a car crash, the car's forward velocity may go from 29 m/s to 0 m/s in 0.15 s. How many g's are experienced, on average, by the driver?
A. 20 g B. 14 g C. 24 g D. 26 g