Betelgeuse Diameter. Estimate the diameter of the supergiant star Betelgeuse from its angular diameter of 0.05 ­arcsecond and distance of about 600 light-years. Compare your answer to the size of our Sun and the Earth-Sun distance.

The material that keeps its new shape after it is stretched is called?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?