Webphysics The membrane that surrounds a certain type of living cell has a surface area of $$ 5.0 \times 10 ^ { - 9 } \mathrm { m } ^ { 2 } $$ and a thickness of $$ 1.0 \times 10 ^ { - 8 } \mathrm { m } $$ Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.0. WebSince a constant fraction of the radiation is absorbed for each thickness x, of absorber, the rate of absorption is exponential, so the measured count rate C will vary according to the …
Activity and half life - Complete lesson (GCSE 1-9)
http://www-naweb.iaea.org/napc/ih/documents/global_cycle/vol%20I/cht_i_06.pdf WebTo calculate the half-life of a sample from a graph: Check the original activity (where the line crosses the y-axies), A0. Halve this value and look for this activity. Go across from the halved value (on the y-axis) to the best fit curve, and then straight down to the x-axis. The point where you reach the x-axis should be the half-life. top paying retail stores
Radioactive decay and half-life - BBC Bitesize
Web2NO (g) + 2H2 (g) → N2 (g) + 2H2O (g) The rate equation for the formation of nitrogen gas (N 2) from nitrogen oxide (NO) and hydrogen (H 2) is: rate = k [NO]2 [H2] Notice that the [H 2] does not have an order of 2. This is because the order must be determined experimentally, not from the equation. The orders of the reaction will be calculated ... WebOct 6, 2024 · 17 cm – 15 cm = 2 cm. Step 2: Take the absolute value of step 1. 2 cm = 2 cm. Step 3: Divide that answer by the accepted value. 2cm 17cm = 0.12 2 c m 17 c m = 0.12 (by rounding off to two significant figures) Step 4: Multiply that answer by 100 and add the % symbol to express the answer as a percentage. Webis done and energy transferred. The energy transferred can be calculated using the equation: energy transferred (work done) (J) = charge (C) × potential difference (V) top paying security guard companies in nyc