A radioactive material has a half-life of 1.0 hour If 200.0 g of it was present at 6 a.m. on a certain day, how many grams will have decayed by 9 a.m. on the same day?

Similar Questions

Which of the following phenomena is not a direct consequence of rectilinear propagation of light? ...

A mass of gas at 7oC and 70cm of mercury has a volume of 1200cm3. Determine its volume at 27oC and p...

The amount of heat needed to raise the temperature of 10kg of copper by 1k is its ...

In the fig above W1 = 200g, and W2 =450g . Calculate the extension of the spring per unit load? [...

When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two ar...

What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it ...

A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the v...

A 0.05kg bullet travelling at 500ms-1 horizontally strikes a thick vertical wall. It stops after pen...

The shortest length of the air column in a resonance tube at resonance is 0.12m and the next resonan...

A ship travelling towards a cliff receives the echo of its whistle after 3.5 seconds. A short while ...