Gold has a half life of 7653yrs. how many years would it take for 200g sample to be reduced to 25g?

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?