the planet neptune is approximately 4.5*10^9 kilometers from the sun. The planet Venus is approximately 1.1*10^8 kilometers from the sun. Which is the best estimate of how many times as far from the sun Neptune is as Venus?

Select all of the statements that are true. Each orbit holds a fixed number of electrons. The n = 1 orbit can only hold two electrons. Each orbit can hold an unlimited number of electrons. Each orbit is limited to a maximum of four electrons.

Which of the following statements is true? Chemical reactions are the same as atomic reactions. Nuclear power can't be used to do beneficial work. The sun uses nuclear fusion reactions to generate heat.

A liquid is cooled if a. evaporation exceeds condensation. b. condensation exceeds evaporation. c. evaporation and condensation proceed at equal rates. d. condensation occurs at twice the rate of evaporation

Which is an example of convection? A) in a mountain forest, the sun heats up the ground B) on a hot day, Amaya pours water on her face to cool off C) at the beach, Stephan's feet get hot walking across the sand D) above the sea, warm air rises,

Which alternative energy source would be expected to be the least dependent upon the weather? a. wind power b. solar power c. geothermal power d. none of the above

If a ball is dropped from rest from an elevated position at the same instant that a second ball is launched horizontally (from the same height), then which ball will hit the ground first? Assume the balls behave as projectiles

What are 5 Non-Examples of Density

With the switch closed, how does the voltage across the 20-ω resistor compare to the voltage across the 10-ω resistor?

A 5.90-g lead bullet traveling at 410 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in

How do you scientists determine the number of neutrons in an isotope of an atom?