A tree was cut down and used to make a statue 2300 years ago. What fraction of 14C that was present originally remains today? t½ of 14C is 5730 yr

A 1 kg durian fruit was raised from the ground how much potential energy does it have when it lifted 10.0m?

You've made the hypothesis that the higher the density of a rock, the higher the temperature at which will melt, because a denser rock contains more material. What should the independent variable be in an experiment testing this hypothesis? A.

Bias or personal opinions never influence scientific results

What will happen to the pressure inside a container of gas if some of the gas is allowed to escape? Select one: a. there will be no effect on the pressure b. The pressure will increase c. the effect is impossible to determine d.

What do electromagnetic waves carry? How are they produced Through which media can they move? Where do they transfer energy? What do they not transfer? What do mechanical waves carry? How are they produced? Through which media can they move?

How many earth minutes are represented by 0.1 martian sol

Which of the following shows three elements in order of decreasing conductivity? A. Zn, Pd, Ag B. Pd, Ag, Zn C. Ag, Pd, Zn D. Zn, Ag, Pd Which of the following is the name of a metal? A. K B. Potassium chloride C. Potassium D. KCI

Which of the following describes nuclear fission? It requires extremely high temperatures to begin the reaction. It involves the combining of nuclei. It involves bonding electrons. Its chain reactions can be initiated by neutrons.

Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor

How many moles of Na are needed to produce moles of NaCl in the reaction below 2 Na + Cl2-->> 2 NaCl A. 2 moles B. 8 moles C. 1 mole D. 4 moles