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
ozzi
3 years ago
6

Which statement best describes SARS? SARS was an epidemic, but not a pandemic. SARS was a pandemic, but not an epidemic. SARS wa

s both a pandemic and an epidemic. SARS was neither a pandemic nor an epidemic
Chemistry
2 answers:
alexandr402 [8]3 years ago
7 0

Answer:

SARS was an epidemic, but not a pandemic.

Explanation:

It is correct to say SARS was an epidemic but not a pandemic.

  • An epidemic is an outbreak of infectious diseases which affects a group of people in a particular areas
  • A pandemic is a global outbreak of diseases that affects the total population of people over a wider range.

SARS outbreak occurred between 2002 - 2004 in China. It was localized to the People's republic and hence, an epidemic.

The recent outbreak of disease in 2020 on the other hand is a pandemic. The infectious disease had a global coverage.

sasho [114]3 years ago
4 0

Answer:

a

Explanation:

You might be interested in
How many moles of Fe2O3 are in 203 g of the compound?
ruslelena [56]
The equation is :
moles=mass/molar mass
so, the mass is 203 and molar mass is 159.69 
You divide the 203 by 156.69 as the equation shows
so the moles is 1.27 mol. 
6 0
3 years ago
What do we need to learn about inclined planes
Troyanec [42]

Answer: Inclined plane, simple machine consisting of a sloping surface, used for raising heavy bodies. The force required to move an object up the incline is less than the weight being raised, discounting friction. The steeper the slope, or incline, the more nearly the required force approaches the actual weight.

Explanation:

4 0
3 years ago
B) All atoms contain<br>charged electrons.<br>​
andrey2020 [161]

Answer:

b) All atoms contain

charged electrons.

Explanation:

8 0
3 years ago
In an electrically heated boiler, water is boiled at 140°C by a 90 cm long, 8 mm diameter horizontal heating element immersed in
RideAnS [48]

Explanation:

The given data is as follows.

Volume of water = 0.25 m^{3}

Density of water = 1000 kg/m^{3}

Therefore,  mass of water = Density × Volume

                       = 1000 kg/m^{3} \times 0.25 m^{3}

                       = 250 kg  

Initial Temperature of water (T_{1}) = 20^{o}C

Final temperature of water = 140^{o}C

Heat of vaporization of water (dH_{v}) at 140^{o}C  is 2133 kJ/kg

Specific heat capacity of water = 4.184 kJ/kg/K

As 25% of water got evaporated at its boiling point (140^{o}C) in 60 min.

Therefore, amount of water evaporated = 0.25 × 250 (kg) = 62.5 kg

Heat required to evaporate = Amount of water evapotaed × Heat of vaporization

                           = 62.5 (kg) × 2133 (kJ/kg)

                           = 133.3 \times 10^{3} kJ

All this heat was supplied in 60 min = 60(min)  × 60(sec/min) = 3600 sec

Therefore, heat supplied per unit time = Heat required/time = \frac{133.3 \times 10^{3}kJ}{3600 s} = 37 kJ/s or kW

The power rating of electric heating element is 37 kW.

Hence, heat required to raise the temperature from 20^{o}C to 140^{o}C of 250 kg of water = Mass of water × specific heat capacity × (140 - 20)

                      = 250 (kg) × 40184 (kJ/kg/K) × (140 - 20) (K)

                     = 125520 kJ  

Time required = Heat required / Power rating

                       = \frac{125520}{37}

                       = 3392 sec

Time required to raise the temperature from 20^{o}C to 140^{o}C of 0.25 m^{3} water is calculated as follows.

                    \frac{3392 sec}{60 sec/min}

                     = 56 min

Thus, we can conclude that the time required to raise the temperature is 56 min.

4 0
3 years ago
Which outcome is the main function of the light-dependent reactions of photosynthesis?
andrew-mc [135]

Answer:

oxygen, water and sugar are the out come of photosynthesis

7 0
3 years ago
Other questions:
  • In which concentration of sulfuric acid solution would the reaction occur the fastest?
    7·1 answer
  • What is stratosphere
    13·1 answer
  • Use the periodic table to answer the questions below.
    9·2 answers
  • How are vertebrates and invertebrates different from each other
    7·2 answers
  • how many calories are absorbed by a pot of water with a mass of 500 g in order to raise the temperature from 20 c to 30 c
    5·1 answer
  • Who is Robert Hooke?
    11·2 answers
  • Matthew was cleaning his car on a very hot summer day. He left the cleaning spray he had bought, and was using, on the driveway
    7·1 answer
  • Please help me ASAP I couldnt copy paste the table so I added a screenshot Please I really need help!!!
    15·1 answer
  • What is the chemical name of NaCl₂
    8·2 answers
  • The bacteria are known to be prokaryotes. Prokaryote means
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!