Answer:
second choice
Step-by-step explanation:
4* 5
= 4 * 17/3 = 68/3 = 22 2/3
I cant see the picture properly
Answer:
or 6.75
Step-by-step explanation:
- To cancel out a fraction you multiply by the reciprocal. To make multiplying easier you can make -3 into a fraction by putting 1 under it
- Multiplying across, two negatives make a positive so the answer is positive
Answer:
12.86 m/s
Step-by-step explanation:
Centripetal acceleartion formula:
Answer:
16.07 milligrams
Step-by-step explanation:
From the question,
Using the formula of radioactive decay,
R/R' = 2ᵃ/ᵇ..................... Equation 1
Where R = Original mass of the polonium-210, R' = Final mass of polonium-210 after decaying, a = Total disintegration time, b = half life of polonium-210.
Make R' the subject of the equation
R' = R/(2ᵃ/ᵇ)................ Equation 2
Given: R = 100 milligrams, a = 1 years = 365 days, b = 138.39 days
Substitute these values into equation 2
R' = 100/(2³⁶⁵⁰⁰/¹³⁸³⁹)
R' = 100/(6.222)
R' = 16.07 milligrams of plonium-210
