How can eclipsing binary stars be identified?

They are brighter than any single stars.

They are cool red stars.

They are all white dwarfs.

They become dimmer at regular intervals.

What is technology? O A. the ability to perform a task in a short period of time using little to no energy OB. the ability to perform a task using a full range of motion in a short period of time OC.

The coefficients in the following reaction 2Al2O3 → 4Al + 3O2 add up to 7. True or False?

Which of the following types of light has the most energy to give to an electron? -infrared -blue -ultraviolet -orange

Which nuclides are most likely to decay via beta decay?

Which statements accurately describe Earth's magnetic field? Check all that apply. The magnetic field lines flow from Earth's geographic South Pole to Earth's geographic North Pole. The magnetic field is created by magnetic rocks on the surface.

A fountain of water and steam that erupts from the ground

A heavy rope, 50 ft long, weighs 0.5 lb/ft and hangs over the edge of a building 120 ft high. how much work is done (in ft-lb) in pulling half the rope to the top of the building?

Does adding a neutron to an atom's nucleus makes it an ion?

What is the difference between a fault-block and upwarped mountains?

Which of the following is not one of the reasons to properly warm up before exercising? A. Develop overall flexibility. B. Increase blood flow to the muscles and raise body temperature. C. Prevent injuries such as strains sprains and muscle cramps.