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Ksivusya [100]
2 years ago
7

What causes people to get sick from E. coli, and what would the symptoms be? Also, how can people avoid eating contaminated food

?
Biology
1 answer:
Lunna [17]2 years ago
4 0

ANSWER FOR QUESTION 1:

The most common type of E. coli infection that causes illness in people is called E. coli O157, which produces a toxin known as Shiga-toxin. Shiga-toxin producing E. coli is abbreviated as STEC. Symptoms of infection with this germ include watery or bloody diarrhea, fever, abdominal cramps, nausea, and vomiting.

ANSWER FOR QUESTION 2:

Some other germs don’t cause as many illnesses, but when they do, the illnesses are more likely to lead to hospitalization. Those germs include: Anyone can get sick from eating contaminated food. Follow four simple food safety steps —clean, separate, cook, and chill—to lower your chance of food poisoning and to protect yourself and your loved ones.

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D Learning Task No.2: Use the GRESA Method in solving the problem below. Show your solutions. Write your answers in your noteboo
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GRESA method stands for given, required, equation, solution and answer.

We are required to solve the question according to the GRESA method. However, the question has multiple sub questions and hence we will solve each one of them separately.

Question 1:

Given:

Net force of 200N

initial velocity is 0 m/s

final velocity is 40 m/s

time is given to be 10 s

Required:

We are required to find the mass of the cart.

Equation:

By using Newton's second law of motion,

F= m x (v-u)/t

Solution:

By putting all the values, we get:

200N = m x ( 40 -0 ) / 10

m = 200 /4  = 50kg

Answer:

The weight of the cart is 50kg.

Hence option (c) 50kg is correct

QUESTION 2:

Given:

mass of ball = 0.4 kg

force of hitting = 16N

Required:

We are required to find the acceleration of the ball after hitting

Equation:

Using Newton's law of motion,

F = m x a

Solution:

By putting all the values, we get:

16 = 0.4 x a

a =16/0.4 = 40 m/s^2

Answer:

Hence option (B) 40 m/s^2 is the correct answer

QUESTION 3:

Given:

mass of papaya =3.5kg

acceleration of papaya = 2.2 m/s^2

Required:

We are required to find the net force applied

Equation:

Using Newton's law of motion,

F = m x a

Solution:

By putting all the values we get:

F = 3.5 x 2.2

  =7.7 N

Answer:

The external force applied is 7.7 N to the left

Question 4:

Given:

net force = 300N

acceleration = 0.750 m/s^2

Required:

We are required to find the mass of the crate

Equation:

By using Newton's second law of motion,

F= m x a

Solution:

By putting all the values, we get:

300 = m x 0.750

m = 300/0.750

    = 400kg

Answer:

Hence the weight of crate is 400kg

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