if a star 100 light years from earth is beginning to expand into a giant star how long will it take for astronomers to observe this development explain

What occurs when two Stars collide into each other?

If you shook the end of a rope up and down 6 times each second, what would be the period of the waves set up in the rope?

A small fish is dropped by a pelican that is rising steadily at 0.500 m/s. How far below the pelican is the fish after 2.50 s?

If the slight resistance you feel from a light switch (when you flick it) is the reaction force, what is the action force? A. flicking the switch B. the light turning on C. friction between your finger and the switch D.

Thing about Entergy transfers: When you rub your hands together what are the energy transfers? When you boil a kettle what energy transfers are happening? Walking up a flight of stairs, what are the energy transfers?

A student conducts and investigation to determine a ball's mass, displacement, velocity and acceleration. (A) Identify each of the following as wither a vector or scalar quantity: Mass, Displacement, Velocity & Acceleration.

A ball is rolling down a hill at + 1.0 m/s, The ball is uniformly accelerating at +4.9 m/s?, What will the ball's velocity be 4.0 s later? +8.9 x 100° m/s +2.0 x 10^1 m/s +2.1 x 10^1 m/s -1.9 x 10^1 m/s

What is the difference between unicellular and multicellular organisms?

Is momentum conserved in the collision?

Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?