A 1200-kg cannon suddenly fires 100kg cannonball at 35m/sWhat is the recoil speed of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally
A) 35 m/s B) 3.5 m/s C) 3.2 m/s D) 2.9 m/s
D
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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
The Sun has a core in which energy travels outward primarily by radiation
a. True b. False Indicate whether the statement is true or false
Why are sunsets and sunrises red?
What will be an ideal response?
A car, driven around a circle with constant speed, must have
A) zero acceleration. B) a centrifugal acceleration. C) zero velocity. D) a centripetal acceleration. E) a tangential acceleration.