draw a graph showing the radioactive decay of 100 grams of an isotope of carbon that has a half-life of 2.5. seconds how many grams of carbon will remain after 2.5 seconds have elapsed

Because of barriers and obstructions, you can see only a tiny fraction of a standing wave on a string. You do not know, for instance, how long the string is.

Explain how a balloon can become positively charged when rubbed with a cloth

It takes four hydrogen nuclei to create one helium nucleus in the proton-proton chain, which is the main energy source of the Sun. If a single hydrogen nucleus has a mass of 1.6726*10-27 kg and a single helium nucleus has a mass of 6.

Which of the statements below is correct about waves? A) All waves do not carry energy. B) All waves carry energy without transferring matter. C) All waves carry energy by transferring matter. D) All waves transfer matter.

What must happen for an ion To form

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?

True or false All forces are different; each exerts a particular type of effect on a object

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

A small kid sits on a bike (Anita). A bigger and stronger person (Jamy) pushing the kid so that the kid starts speeding up. (neglect friction). Mark all correct statements about the forces between them. A.

A ___ is awarded to the opposing team when that team violently or dangerously charges a opponent. (in soccer) A) Goalie kick B) Indirect kick C) Direct kick D) Throw in