The Law of Universal Gravitation states that gravity is___ proportional to the product of the two
2 answers:
Answer:
The Law of Universal Gravitation states that gravity is <u> </u><u><em>directly</em></u> proportional to the product of the two masses and <u><em>inversely</em></u> proportional to the squared distance between the two masses.
Explanation:
The Law of Universal Gravitation is:
Where F represent the gravitational force, m1 and m2 are the two masses and r2 is the distance between the two masses.
As state in the equation, the two masses appear as multiplicative factors of equality, therefore they are directly proportional, before any increase N of m1 or m2, the force will increase N times; contrary case is with r which appears as dividing factor, before an increase N of r, the force will decay exponentially to the square, reason why it is an inverse proportion.
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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:
Five: B
Ten: A
Explanation:
Five
An alpha decay looks like this.
So whatever is produced must have a mass of 4 less than 234 and a number on the periodic table of 2 less than 92. In other words, B has a mass of 230 and a number on the periodic table of 90.
The answer should be Thorium which is B.
Ten
There is actually not enough information to do 10. You get it by making an assumption and seeing if it works.
In general a beta decay can (the most common one ) look like this.
Is there anything that looks like that?
The weight stays the same (234) and the atomic number of the mother element (on the left) is 1 lower than the given chemical on the right.
The answer is Thorium A
Beta decays are very tricky. Be very careful how you handle them. One of three items can be what is decayed. I have assumed it was an electron, but there are two other possibilities. I won't confuse you by adding them. Just be aware that they exist.