A bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10 cm
(a) What is the average acceleration of the bullet?
(b) How long does it take to come to rest?
(a) -1.25 × 106 m/s2
(b) 0.4 ms
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Most of the waves in the electromagnetic spectrum are
A) red light. B) blue light. C) green light. D) invisible.
Most of the state of Nevada is in the Basin and Range Province. The predominant active fault for this region is
A) thrust faulting. B) reverse faulting. C) normal faulting. D) none of the above
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.
An initially uncharged 10-?F capacitor is charged by a 10-V battery through a resistance R. The capacitor reaches a potential difference of 4 V in a period of 3 s after the charging began. Find the value of R