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 are the standard units of specific gravity? g/cm3 kg/L kg/cm3 none

Which type of power station has the fastest start up time? Coal, natural gas, nuclear or oil?

If his truck pulls forward with a force of 2,750 newtons and the weight of the trailer pulls backward with a force of 2,790 newtons, which of the following statement is true?

The chains and sheets of galaxies and voids between them observed in the large-scale structure of the universe were once thought to be inconsistent with the Big Bang theory.

What is the least dense part of the atmosphere?

Two stars, x and y, have the same temperature. star x is ten times more luminous than star y. which star has the larger radius

If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is A. mg/2 B. mg C. 2mg D. 4mg

In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates. In one room the radiator has a dark color (emissitivity = 0.830). It has a temperature of 64.1 oC.

Air is compressed adiabatically in a piston-cylinder assembly from 1 bar, 300 K to 10 bar, 600 K. The air can be modeled as an ideal gas and kinetic and potential energy effects are negligible.

Three rocks, each of varying mass and volume, are released from a window at the same time. The window is at height h above the ground.