1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NARA [144]
3 years ago
7

The transmission coefficient of the hypothetical disease dumas fever is 0.2. if the combined death and recovery rate is 0.4, wha

t is the threshold density for dumas fever?
Physics
1 answer:
borishaifa [10]3 years ago
7 0
NT = r / β
where NT is the threshold density, r is the recovery and death rate and β is the transmission coefficient.

= 0.4 / 0.2
= 2
You might be interested in
How much energy is required to move 2 electrons through a potential difference of 1.0 x 10^ 2 volts?
Ksenya-84 [330]
Charge of electron = 1.6×10−¹⁹

(1.6×10−¹⁹)(1×10²) (2e)

= 3.2×10−¹⁷ J
3 0
3 years ago
What is the mass of a truck in grams of it produces a force of 1500N while accelerating at a rate of 6 m/s²?​
aleksley [76]

Answer:

250,000

Explanation:

<h2> </h2>

<h2>formula = ( F=ma </h2>

  • F=1500N
  • a=6m/s^2
  • F= ma
  • m=?
  • 1500/6 = m
  • m=250 kg
  • 1kg =1000gm so 250kg =250,000gm
  • m =250×10^3 gm
5 0
3 years ago
A wheel with moment of inertia 25 kg. m2 and angular velocity 10 rad/s begins to speed up, with angular acceleration 15 rad/sec2
Pani-rosa [81]

Answer:

(A) Angular speed 40 rad/sec

Rotation = 50 rad

(b) 37812.5 J

Explanation:

We have given moment of inertia of the wheel I=25kgm^2

Initial angular velocity of the wheel \omega _0=10rad/sec

Angular acceleration \alpha =15rad/sec^2

(a) We know that \omega =\omega _0+\alpha t

We have given t = 2 sec

So \omega =10+15\times  2=40rad/sec

Now \Theta =\omega _0t+\frac{1}{2}\alpha t^2=10\times 2+\frac{1}{2}\times 15\times 2^2=50rad

(b) After 3 sec \omega =10+15\times 3=55rad/sec

We know that kinetic energy is given by Ke=\frac{1}{2}I\omega ^2=\frac{1}{2}\times 25\times 55^2=37812.5J

7 0
3 years ago
Doyle learned that only one side of the Moon is ever visible from Earth. He wants to investigate how the moon moves around the E
alisha [4.7K]
Your answer is C. Development of a model
3 0
3 years ago
in the circuit diagram, what does the symbol made of two long lines and two short likes with a positive and a negative sign at e
IrinaVladis [17]
It is a battery (the long and short lines represent 2 cells)
7 0
3 years ago
Other questions:
  • A pump uses a piston of 15 cm diameter that moves at 2.0 cm/s as it pushes a fluid through a pipe. what is the speed of the flui
    9·1 answer
  • Give reason 1.electromagnets are temporary magnets ?
    13·1 answer
  • A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. what is the lowest frequency associated with this p
    10·1 answer
  • On a guitar if you hit the harder you strike the string the:
    15·1 answer
  • Light rays bend as they pass from air into water at an angle (not 90 degrees). this is refraction. air water normal incident ray
    13·1 answer
  • Why will renewable technologies become cheaper, according to economists?
    11·1 answer
  • If g were 15 instead of 9.81, what would your quads look like?
    8·1 answer
  • If a person is driving a speed of 162 km and drive for 35 seconds. How far will they drive?
    14·1 answer
  • A woman drives a 45 gram golf ball off of a tee and gives the ball a velocity of 28 m/s to the right. What is the change in mome
    9·1 answer
  • On which teeth are brackets most commonly
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!