NEET + JEEAdvanced
A radioactive sample has an initial activity of 8000 disintegrations…
Question
A radioactive sample has an initial activity of 8000 disintegrations per second and a half-life of 10 days. Find its activity (in disintegrations per second) after exactly 30 days.
✓ Verified answer: 1000checked by our engine — not a guess
Step-by-step solution
Activity halves every half-life. 30 days = 3 half-lives, so A = A0/2^3 = 8000/8 = 1000 dps.
Final answer1000.0
Stuck on a problem like this?
Paste any JEE or NEET question — verified working, a confidence %, and an honest “not sure” instead of a bluff.
Solve my doubt →More Neet Modern Thermo solutions
Light of a single wavelength falls on two different metal surfaces.…NEET + JEE · PhysicsIn a singly-ionized helium atom (He+, atomic number Z = 2) the…NEET + JEE · PhysicsA hypothetical photoelectric experiment uses the same monochromatic…NEET + JEE · PhysicsFor the n = 2 stationary orbit of a hydrogen atom (Bohr radius a0 =…NEET + JEE · PhysicsTwo deuterium nuclei fuse to form a helium-4 nucleus. Given atomic…NEET + JEE · PhysicsA Zener diode of breakdown voltage 6 V is used as a voltage…NEET + JEE · PhysicsAn n-p-n transistor in common-emitter configuration has a current…NEET + JEE · PhysicsAt what temperature (in kelvin) would the rms speed of oxygen…NEET + JEE · Physics