A projectile that is fired vertically from the surface of Earth at 8 km/s will
A) go into circular orbit about Earth.
B) rise and fall back to Earth's surface.
C) follow an uncertain path.
D) escape from Earth.
Answer: B
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Muons at speed 0.9995c are sent round and round a circular storage ring of radius 550 m. If a muon at rest decays into other particles after an average T =2.2 × 10^?6 s, how many trips around the storage ring do we expect the 0.9995c muons to make before they decay?
a. 1 b. 2 c. 12 d. 6 e. 131
A beam of light in air is incident on a glass slab at an angle of incidence < 90°. After entering the glass slab, the beam of light
A) does not change its path. B) follows the normal to the glass slab. C) bends away from the normal drawn at the point of contact. D) bends closer to the normal drawn at the point of contact.
The simplest life forms appeared on Earth by the time it was how old?
A) five million years B) one billion years C) 2.5 billion years D) 3.5 billion years E) 4.5 billion years
Charge of uniform density 12 nC/m is distributed along the x axis from x = 2.0 m to x = 5.0 m. What is the electric potential (relative to zero at infinity) at the origin (x = 0)?
A. 91 V B. 99 V C. 82 V D. 74 V E. 140 V