A sample of radium-226 will decay to 1/4 of its original amount after 3200 years. What is the half-life of radium-226?

Found Answer: 1600

Thermal energy is added to four identical samples of water what increases in each sample

A 58 kg woman and a 70 kg man stand 18.0 m apart on frictionless ice. (a) how far from the man is their center of mass (cm) ? 8.15625 correct: your answer is correct.

Is kinetic energy is always transformed into potential energy.

9) This is an attractive force between any two objects due to mass.

Which applications, either for diagnostic purposes or for therapeutic purposes, involve radioactive materials placed in the body? Check all that apply.

Which statement best describes the relative conductivity of semiconductors? a. They are the most conductive elements. b. They are the least conductive elements. c. They are more conductive than metals but less conductive than nonmetals. d.

A tire swing is released from some initial height such that the speed of the tire at the bottom of the swing is 2.5 m/s. What is the initial height of the tire? Note: g = 9.8 m/s2 A 0.13m B 0.16m C 0.32m D 3.1 m

Paleoclimatologists study the climate and its changes throughout earths history. what observation by paleoclimatologists led scientists to predict that the average temperature of the planet is rising due to the combustion of fossil fuels?

Which is bigger, a kilometer or a mile?

A coach wants her team to have fun, win some games, and be a productive unit. What is the most important personality trait the coach should demonstrate to achieve her goals? sportsmanship leadership persistence discipline