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Svetradugi [14.3K]
4 years ago
10

Select the common uses of radioactive elements in health care.

Physics
1 answer:
Mumz [18]4 years ago
8 0

Following are the uses of radioactive elements in health care:

(a) Technetium-99 is used to image the skeleton and heart muscle in particular, but also for brain, thyroid, lungs etc.

(b) Chromium-51 is used to label red blood cells and quantify gastro- intestinal protein loss.

(c) Cobalt-60 is used for external beam radiotherapy.

(c) Copper-64 is used to study genetic diseases affecting copper metabolism.

(d) Erbium-169 is used for relieving arthritis pain in synovial joints.

(e) Iodine-125 is widely used in radioimmuno- assays to show the presence of hormones in tiny quantities.

(f) Iodine-131 is widely used in treating thyroid cancer and in imaging the thyroid.

(g) Iron-59 is used in studies of iron metabolism in the spleen.

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Earth attracts a person with a gravitational force of 7.0 × 102 newtons. What is the magnitude of the force with which the indiv
Anuta_ua [19.1K]
This is a good time to review Newton's 3rd law of motion:
"For every action, there is an equal and opposite reaction."

Gravitational force always acts in pairs.
Whatever force the Earth attracts something with,
the thing attracts the Earth with exactly the same force.

If Earth attracts a person with a gravitational force of <span><span>7.0 × 10² </span>newtons,
the person attracts Earth with a gravitational force of 7.0 × 10² newtons.

Your weight on Earth is the same as the Earth's weight on you !
</span>
5 0
4 years ago
Which block gets to the bottom of an incline first
Mila [183]
I can't help if u don't write the full question
8 0
3 years ago
. Two astronauts are 1.90 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via elec
melomori [17]

Answer:

d= 1650 km.

Explanation:

  • Assuming that sound waves travel along a straight line at a constant speed of 346 m/s, we can find the time needed for the sound to travel the distance of 1.9 m between the astronauts, just applying the definition of average velocity, as follows:

       t = \frac{\Delta x}{v} =\frac{1.9m}{346m/s} = 5.5 msec  (1)

  • The electromagnetic waves travel in free space at the same speed of light in vacuum ( since light is a electromagnetic wave indeed), i.e., 3*10⁸ m/s.
  • Applying the same formula than in (1) we can solve for the distance d, as follows:

       d = v*t = 3e8 m/s*5.5e-3s = 1650 km (2)

3 0
3 years ago
Which explains the greenhouse effect?
MatroZZZ [7]
Since greenhouse gases are a main cause of global warming, so the answer must be B.

3 0
3 years ago
if jack was traveling north 120 miles and it took him 3 hours to get there. what is the velocity that jack was traveling? is thi
uysha [10]

Velocity of an object is given as

velocity = \frac{displacement}{time}

now we have

displacement = 120 miles

time = 3 hours

now from above formula

v = \frac{120}{3}

v = 40 miles/hour

so its velocity is 40 mph and its a vector quantity whose direction is towards NORTH

correct answer is B

7 0
4 years ago
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