First km/h to m/s:
m/s = km/h / 3.6
m/s = 72 / 3.6
m/s = 20
Now, use the formula:
Vf = Vo + at
Clear t:
t = (Vf - Vo) / a
Replace:
t = (30 m/s - 20 m/s) / 0.5 m/s²
Resolving:
t = 10 m/s / 0.5 m/s²
t = 20 s
It will take <u>20 seconds.</u>
The radioactive tracer (radiopharmaceuticals) is used to assess bodily function and diagnosing and treating the disease. It is made up of carrier molecules bondeed tightly to radioactive atom. Some interact with specific protein or sugar in the body of the person. Radioactive tracer can be administered through intravenous injection, inhalation, oral ingestion, or direct injection into an organ.
A) The electrons may jump to a higher energy level.
#1 is sand dune , #2 glaciers , #3 sand sediments hence small mass and #4 is <span> moraine .</span>
The height of the plane delivering a food package to people stranded on an island is 722.2 m.
<h3>
Time of motion of the food package</h3>
The time taken for the food package to hit the ground level is calculated as follows;
X = vt
where;
- X is horizontal distance traveled by the food package
- v is horizontal distance
- t is time of motion
t = X/v
t = 789/65
t = 12.14 seconds
<h3>Height of the plane</h3>
h = ¹/₂gt²
where;
- h is height of fall of the food package which is height of the plane
- t is time of motion of food package
- g is acceleration due to gravity
h = (0.5)(9.8)(12.14²)
h = 722.2 m
Thus, the height of the plane delivering a food package to people stranded on an island is 722.2 m.
Learn more about height here: brainly.com/question/1739912
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