Time Dilation: A certain unstable particle has a mean lifetime of 1.52 × 10-6 s. This is the time interval between its creation in a nuclear process and its extinction into decay products, as measured in a frame of reference at rest with respect to the particle. An average such particle is observed by a scientist on Earth to travel 342 m in its lifetime. What is the speed of the particle relative to Earth? (c = 3.00 × 108 m/s)
A. 0.821c
B. 0.681c
C. 0.600c
D. 0.551c
E. 0.335c
Answer: C
You might also like to view...
Using an orbit size of 8 kpc, and a period of 225 million years, the mass of our Galaxy is found to be closest to
A) 106 solar masses. B) 108 solar masses. C) 1010 solar masses. D) 1011 solar masses. E) 1012 solar masses.
A very light 1.00-m wire consists of two segments of equal length, one of steel (Young's modulus is 2.00 × 1011 N/m2 )
and one of brass (Young's modulus is 9.0 × 1010 N/m2 ). The steel segment is 1.50 mm in diameter, and the brass segment has twice this diameter. When a weight w is hung from the ceiling by this wire, the steel segment stretches by 1.10 mm. Find the weight w. A) 190 N B) 390 N C) 780 N D) 1000 N E) 3100 N
A uniform rod (mass = 1.5 kg) is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a horizontal position. What is the angular speed of the rod when the rod makes an angle of 30° with the horizontal? (The rotational inertia of the rod about the pin is 2.0 kg/m2)
a. 2.2 rad/s b. 3.6 rad/s c. 2.7 rad/s d. 3.1 rad/s e. 1.8 rad/s
Explain why the laser beams used in inertial confinement fusion are even in number (such as 16 or 32)
What will be an ideal response?