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

A fluid must be liquid and not any other state of matter. true or false?

A 100 kg roller coaster car is located at the top of a hill where the height is 20 m. What is the velocity when it reaches the bottom of the hill?

What is 6.9x10^7 written is standard form

Learning goal: to practice problem-solving strategy 6.1 work and kinetic energy. your cat "ms." (mass 8.50 kg) is trying to make it to the top of a frictionless ramp 2.00 m long and inclined 19.0 ∘ above the horizontal.

The second law of thermodynamics states that spontaneous processestend to be accompanied by entropy increase.

How does gravity correspond to the bending of the space-time fabric

Compare the theories that scientists proposed about the source of the sun's energy with the process of nuclear fusion in the sun

Which wave A or B has a higher energy

What does the law of conservation of energy state about energy in a closed system?

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. Why did he expect a difference