Which is the correct life sequence of a star?

main sequence, dwarf, giant, nebula

nebula, giant, main sequence, dwarf

dwarf, nebula, main sequence, giant

nebula, main sequence, giant, dwarf

A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume. At a radial distance r1 = R/4 from the center, the electric field has a magnitude E0.

If you view a complete free body diagram of a moving object, what two apects of the body's motion will the diagram show?

Plutonium-241 is an isotope of plutonium that is highly radioactive and is used in some nuclear reactors and many nuclear weapons. It has a half-life of 14.4 years.

Combining which of the following substances with germanium will cause the germanium to emit free electrons? A. Bismuth B. Gallium C. Aluminum D. Indium

Does the black hole at the center of the Milky Way create danger for Earth?

During a medical condition screening lung capacity testing is a standard procedure. True of false

Which of the following is a unit of energy found in food? a). vitamin b) calorie c) nutrient d) water

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 of the following surfaces reflects the most light A yellow cloth B. tree trunk C aluminum foil D. Concrete sidewalk

Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom? A. nucleus B. electron C. proton D. electron cloud