They discovered a vaccine to reduce illnesses, specifically Polio and Influenza. The work of Salk and Sabin has almost eradicated what was once a deadly disesase ( polio) . For example, there were 350,000 deaths related to poliovirus across the world in 1988 and they reduced to 22 in 2017. Also, their work has saved millions of lives from polio induced paralysis
Answer:
Five Characteristics of a Mineral
Minerals Are Natural. You must find minerals in nature; substances concocted in laboratories don't qualify. ...
Minerals Are Inorganic. ...
Minerals Are Solids. ...
Definite Chemical Composition. ...
Crystalline Structure.
These are just some examples.
Explanation:

<h3>Explanation</h3>
,
where
is the current;
is the drift speed;
is the cross-section area of the wire,
is the number of charge carrier per unit volume, and
is the charge on each charge carrier.
Area of a circular cross-section:
,
where
is the radius of the wire.
and
are the same for all four samples, for they are made out of the same material.
As a result,
of each wire is directly proportional to
where the value of
is constant.
For each of the four wires:
.
How do the four wires rank by their current?
d > a > b > c.
Bottom of the water tower
Explanation:
When holes are drilled through the wall of a water tower, water will spurt out the greatest horizontal distance from the hole closest to the bottom of the water tower.
This is because the near the bottom of the tower is the greatest compared to other parts of the tower.
- The pressure increases with depth.
- As the depth of water increases, the column of water above exerts more pressure on the one below.
- Therefore, water will spurt out more from the bottom of the tower compared to the top of the tower.
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The initial speed of the boat is

and its acceleration is

Since the boat is moving by uniform accelerated motion, the distance covered by the boat in a time t=10 s is given by:

So, the boat covers a distance of 350 m in 10 seconds.