A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.6 m in a time of 4.0 s. Fi
1 answer:
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Speed of Dayshawn travelling towards his home is 12 m/s
Speed of her mom towards his school is 5 m/s
They both starts at same time so whenever they will meet on their path the sum of the distance covered by Dayshawn and distance covered by his mom must be equal to the total distance of school and home
Now let say they both meet after "t" time when they starts motion
so we can write the total distance between school and home as
here d = 6492 m
= speed of dayshawn
= speed of his mom
now by solving the above equation
so they will meet after 381.9 s from start which will be 3.36 minutes from there start
Also at this time the distance covered by her mom will be
so they will meet at distance 1909.4 m from their home
Answer:
at distance 18.33 ft no biological effects
Explanation:
given data
distance = 41 ft
radiation = 5 rem
to find out
how close get so no biological effects
solution
we know here that intensity of radiation R is inversely proportional to (radiation)²
so here equation will be
.............1
here I is intensity
so here I1 = 25
because for 0 to 25 there is no detectable effects and for 25 to 100 it will . temporary decrease so
we take 25 because dose is less than 25 so we take that highest value
so
R1 = 18.33 ft
so at distance 18.33 ft no biological effects
In order to find which rational number is between 0 and 1, let's convert them into their decimal form:
Looking at the numbers in their decimal form, we can see that the number between 0 and 1 is one-fourth, therefore the correct option is the second one.