A certain cluster of stars has the following characteristics: It is made up of a few thousand young blue stars. These stars are well spread out. The cluster seems to have no definite order or shape. What could this cluster be? A) an open cluster B) a spiral galaxy C) a globular cluster D) an elliptical galaxy

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

Aplane travels 1000 miles in 5 hours .what is the planes average speed?