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2 years ago

Mangrove forests play an important role in _______.

1 answer:

4 0

D. All of the above

At high tide fish will feed among the mangrove roots - rich fishing ground

The trees trap sediment and soil in the river that would flow out to sea which also helps stop erosion

Wildlife utilise almost every part of the tree, with insects and birds, monkeys and lizards in the branches, shrimps and fish in the roots, and snails and clams in the soil

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You are called to the crime scene immediately and you begin your investigation at 2 PM. The first thing you do is take the tempe

adell [148]

As per Newton's law of cooling we know that

$\frac{\Delta T}{dt} = k(T_avg - T_s)$

in 5 hours the body temperature becomes 79.6 from 84.4

while the surrounding temperature is given as 68 degree F

now from above formula

$\frac{84.4 - 79.6}{5} = k (\frac{84.4 + 79.6}{2} - 68)$

$0.96 = k(14)$

now let say the person died "t" time ago

now we will have

$\frac{98.6 - 84.4}{t} = k (\frac{98.6 + 84.4}{2} - 68)$

$\frac{14.2}{t} = k(23.5)$

$\frac{14.2}{t} = \frac{0.96}{14}(23.5)$

$t = 8.8 hours = 9hours (approx)$

so he died at approx 5 Am in morning

5 0

3 years ago

What is Newton’s 3rd Law of Motion?

sasho [114]

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

Explanation:

5 0

3 years ago

What is true when an object floats in water? A. When an object floats, it exceeds the volume of water available. B. When an obje

lukranit [14]

Answer:

C. When an object floats, it does not displace its entire volume.

Explanation:

Buoyancy can be defined as an upward force which is created by the water displaced by an object.

According to Archimede's principle, it is directly proportional to the amount (weight) of water that is being displaced by an object.

Basically, the greater the amount of water an object displaces; the greater is the force of buoyancy pushing the object up. The buoyancy of an object is given by the formula;

$Fb = pgV$

$But, \; V = Ah$

$Hence, \; Fb = pgAh$

Where;

Fb = buoyant force of a liquid acting on an object.

g = acceleration due to gravity.

p = density of the liquid.

v = volume of the liquid displaced.

h = height of liquid (water) displaced by an object.

A = surface area of the floating object.

The unit of measurement for buoyancy is Newton (N).

Additionally, the density of a fluid is directly proportional to the buoyant force acting on it i.e as the density of a liquid decreases, buoyancy decreases and vice-versa.

Furthermore, an object such as a boat, ship, ferry, canoe, etc, are able to float because the volume of water they displace weigh more than their own weight. Thus, if a boat or any physical object weighs more than the volume of water it displaces, it would sink; otherwise, it floats.

In conclusion, the true statement is that when an object floats, it does not displace its entire volume.

4 0

3 years ago

Can someone help me?

vlabodo [156]

1. Science.
2. evidence

6 0

4 years ago

Read 2 more answers

Which safety procedure should you follow after breaking a mercury thermometer?

agasfer [191]

B. move away from the mercury and notify the teacher :)

you should never use a broom to sweep mercury, it breaks the mercury in smaller droplets and spread them.
Pouring the mercury in the sink would likely be logged in the plumbing. and pickingthings up with the napkin may cause contamination and cuts from the glass.

3 0

3 years ago