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3 years ago

What one characteristic will most likely lead to a disease outbreak being classified as a pandemic?

1 answer:

7 0

Phase 1: A virus in animals has caused no known infections in humans.<span>Phase 2: An animal flu virus has caused infection in humans.</span><span>Phase 3: Sporadic cases or small clusters of disease occur in humans. Human-to-human transmission, if any, is insufficient to cause community-level outbreaks.</span><span>Phase 4: The risk for a pandemic is greatly increased but not certain.</span><span>Phase 5: Spread of disease between humans is occurring in more than one country of one WHO region.</span><span>Phase 6: Community-level outbreaks are in at least one additional country in a different WHO region from phase 5. A global pandemic is under way.</span>

How many people die from a pandemic depends upon:

<span>The number of people who become infectedThe severity of disease caused by the virus (its virulence)The vulnerability of affected populations<span>The effectiveness of preventive steps
</span></span>

You might be interested in

Why would ash from a volcano make the temperature drop?

Komok [63]

First, volcanic eruptions produce major quantities of carbon dioxide (CO2), a gas known to contribute to the greenhouse effect. ... The small ash particles decrease the amount of sunlight reaching the surface of the earth and lower average global temperatures.

7 0

3 years ago

2. A 2,000 kg rocket is launched 12 km straight up at a constant acceleration into the sky at which point the rocket is travelli

Mice21 [21]

Answer:

797700000 J

Explanation:

From the question,

The work done by the rocket, is given as,

W = Ek+Ep............. Equation 1

Where Ek and Ep are the potential and the kinetic energy of the rocket respectively.

Ep = mgh............ Equation 2

Ek = 1/2mv²............. equation 3

Substitute equation 2 and equation 3 into equation 1

W = mgh+1/2mv².............. Equation 4

Where m = mass of the rocket, h = height, v = velocity of the rocket, g = acceleration due to gravity.

Given: m = 2000 kg, h = 12 km = 12000 m, v = 750 m/s, g = 9.8 m/s²

Substitute into equation 4

W = 2000(12000)(9.8)+1/2(2000)(750²)

W = 235200000+562500000

W = 797700000 J

6 0

3 years ago

A 12.0 μF capacitor is charged to a potential of 50.0 V and then discharged through a 265 Ω resistor. A)How long does the capaci

larisa [96]

(a) The time for the capacitor to loose half its charge is 2.2 ms.

(b) The time for the capacitor to loose half its energy is 1.59 ms.

<h3>Time taken to loose half of its charge</h3>

q(t) = q₀e-^(t/RC)

q(t)/q₀ = e-^(t/RC)

0.5q₀/q₀ = e-^(t/RC)

0.5 = e-^(t/RC)

1/2 = e-^(t/RC)

t/RC = ln(2)

t = RC x ln(2)

t = (12 x 10⁻⁶ x 265) x ln(2)

t = 2.2 x 10⁻³ s

t = 2.2 ms

<h3>Time taken to loose half of its stored energy</h3>

U(t) = Ue-^(t/RC)

U = ¹/₂Q²/C

(Ue-^(t/RC))²/2C = Q₀²/2Ce

e^(2t/RC) = e

2t/RC = 1

t = RC/2

t = (265 x 12 x 10⁻⁶)/2

t = 1.59 x 10⁻³ s

t = 1.59 ms

Thus, the time for the capacitor to loose half its charge is 2.2 ms and the time for the capacitor to loose half its energy is 1.59 ms.

Learn more about energy stored in capacitor here: brainly.com/question/14811408

#SPJ1

6 0

2 years ago

The tip of a nail exerts tremendous pressure when hit by a hammer because it exerts a large force over a small area. What force

yanalaym [24]

Answer:

Force, F = 2714.33 N

Explanation:

It is given that,

Diameter of the circular tip, d = 1.2 mm = 0.0012 m

Radius, r = 0.0006 m

Pressure acting on the hammer, $P=2.4\times 10^9\ N/m^2$

Let F is the force exerted on a nail. It can be calculated using the definition of pressure exerted. Its formula is given by :

$P=\dfrac{F}A}$

$F=P\times \pi r^2$

$F=2.4\times 10^9\ N/m^2 \times \pi (0.0006\ m)^2$

F = 2714.33 N

So, the force exerted on a nail 2714.33 N. Hence, this is the required solution.

4 0

4 years ago

B) Write the name of the devices<br>which are shown in the given<br>figures and write their uses

Katena32 [7]

Answer:

transparent Prism

Explanation:

The device shown is a prism. It is used to study the refraction of light according with its wavelength as it transverses from a medium (air for example) to another (either glass, fluorite, plastic), and vice versa.

For that reason is also used to separate white light into its spectral wavelength components.

3 0

3 years ago