A pi is a subatomic particle called a Pion that is positively charged. It has a mean lifetime of about 26 ns (26x10-9 s) as measured in the lion's frame of reference. Suppose a pion is created in the atmosphere and is moving at 0.507c relative to a stationary observer on Earth. How long does the pion "live" in ns according to the Earth bound observer

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.