This element has an atomic number that is double the atomic number of silicon

Which material is a good conductor of thermal energy

1 What properties of a star are needed to calculate the star's luminosity? A. Size and apparent brightness B. mass and distance to the star. C. temperature and diameter of the star D. apparent brightness and distance to the star. 2.

Which of the following processes are spontaneous? Check all that apply. the extraction of iron metal from iron ore a hot drink cooling to room temperature drawing heat energy from the ocean's surface to power a ship the combustion of natural gas

How much force is needed to accelerate an object of mass 90 kg at a rate of 1.2 m/s^2 A. 0.013 N B. 75 N C. 108 N D. 1080 N

A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 591 N. As the elevator later stops, the scale reading is 391 N.

Show your conversions on the right 8500 mm 2. 250 mg 3. 500000 g 4. 201 = 5. 0.5 Km 6. 350 mm

As one goes from left to right in a period, which of the following is true? A. The number of protons decreases. B. The number of valence electrons increases. C. both A and B D. none of the above

Which phrases describe organisms that formed index fossils

What will happen to plant height if the amount of available light is reduced due to global dimming? Which type of investigation would most likely be conducted to answer the following question?

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?