The count rate of an alpha-particle source is 400 per minute. If the half-life of the source is 5 days, what would be the count rate per minute after 15 days?

Similar Questions

A cell of e.m.f. 1.5V is connected in series with a resistor of resistance 3.0$\Omega$. A voltmete...

Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is ...

When light from a source is sent through a gas. i. certain wavelengths are absorbed. ii. a dark ...

A note of frequency of 2000Hz has a velocity of $400ms^{-1}$. What is the wavelength of the note?...

a beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to kee...

The potential energy in an elastic string of force constant K which has been extended by X metres is...

Which of the following statements is NOT correct? ...

I. All the three forces must be concurrent. II. The upward force is equal to the downward force. I...

The set-up illustrated above shows a capillary tube of uniform cross-sectional area in two different...

What type of motion does the skin of a talking drum perform when its being struck with the drum stic...