MODERN PHYSICS

IIT JEE 2015 Sample Questions › General Physics questions › MODERN PHYSICS

A Li⁷ target is bombarded with a proton beam current of 10^-4A for 1 hour to produce Be⁷ with an activity of 1.8 *10⁸
disintegrations per second . assuming that one Be radioactive nucleus is produced by 1000 protons bobarding the Li target then

Half life of Be in units of log2 is ?

ANSWER = 12.5 * 10⁶ s in terms of log2

#Physics #General Physics

UP 0 DOWN 0 0 7
Post on FacebookPost anonymously?

7 Answers

1

Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-04-05 09:27:16

ln2/(1.355 *10^8)

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

questions ·2009-04-05 09:30:15

HOW TO DO IT ?

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-04-05 09:34:54

answer rite hai kya m nt sure :S

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-04-05 09:42:06

answer kya hai ?? options toh de diyo

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

questions ·2009-04-05 09:43:47

answer toh galat hain yar

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-04-05 09:46:01

aacha as pass hoga toh bata :P

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

questions ·2009-04-06 10:24:02

kisiko bhi aata hain kya ?

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω