The terrestrial planets have mantles of ________ materials and iron rich cores

Fill in the blank(s) with correct word


silicates or rocky

Physics & Space Science

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Why do some radio galaxies appear to have lobes while some do not?

What will be an ideal response?

Physics & Space Science

A 0.600-kg piece of metal is heated to 100°C and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at 17.3°C

The final equilibrium temperature of the mixture is 20.2°C, what is the specific heat of the metal? A) 140 J/kg ? C° B) 180 J/kg ? C° C) 270 J/kg ? C° D) 450 J/kg ? C° E) 900 J/kg ? C°

Physics & Space Science

All telescopes must be operated on site by an astronomer or a technician

a. True b. False Indicate whether the statement is true or false

Physics & Space Science

Most galaxies are in ________, which contain hundreds or thousands of galaxies

Fill in the blank(s) with correct word

Physics & Space Science