Use the ruler to measure the length of Line segment R S to the nearest centimeter.
2 answers:
Answer:
Length of the line segment RS is, 18 cm.
Step-by-step explanation:
Two points are drawn on a ruler. Point R is located at 8 cm and Point S is located at 26 cm.
So, length of the line segment RS is,
(26 - 8) cm\
= 18 cm
We know that on a ruler if two points A and B are at a cm and b cm respectively, then, length of AB
= AB = cm .
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Correct question:
Which reaction describes a beta emission? 2659Fe→ 2759Co + −10e, 88226Ra→ 86222Rn + 24He, 94239Pu + 24He→ 96242Cm + 01n, 54118Xe→ 53118I + +10e
Answer:
2659Fe→ 2759Co + 1e
Step-by-step explanation:
General equation for beta decay is given as;
where;
A is the atomic mass of the element
z is atomic number of the element
X is the parent atom
Y is the daughter element
β is beta emission
In beta emission, there is loss of one electron and zero proton, the will cause the daughter element to gain on electron in order to balance the reaction.
Based on beta decay equation above, we select the reaction that describes beta emission.
2659Fe→ 2759Co + 1e
Here;
A = 59
z = 26
z + 1 = 27