PLEASE HELP!!! URGENT MATTERS!!!!

Describe and give an example of mutualism.

Slav-nsk [51]

Answer:

Mutualism, commensalism, parasitism, competition, and predation.

Explanation:

mutualism- relationship between two or more organisms where both are benefited. Example-oxpecker with rhino/zebra. They eat bugs off of them which means that they are getting food, while the rhino/zebra are getting cleaned up with pest control.

commensalism- relationship between two organisms where one benefits and the other isn't benefited or harmed. EX- tree frogs use plants as protectioin.he frog is benefited, and the plant is neither harmed nor benefited. Remora fish have a disk on their heads that they use to attach themselves to larger animals for protection. The animals they attach to are neither harmed nor benefited.

parasitism- in a relationship where an organism benefits at the expense of the other. (one is benefited while the other is harmed) ex- fleas and ticks that live on cats and dogs, tape worms that live in people and animals that eat the food which means that the people aren't getting the food or nutrition that they eat. lice, etc

competition- interaction within organisms/species in which both the organisms/species are harmed and is apart of natural selection. Examples may include two males fighting over a mate, animals competing over food, limited habitats that they are fighting over, territory, etc.

predation- the preying of one animal on another. It's where the predator hunts and eats another organism which is its prey. categorized within-(1) carnivory, (2) herbivory, (3) parasitism, and (4) mutualism. Each type of predation can by categorized based on whether or not it results in the death of the prey.ex- owls hunting mice, wolves hunting rabbits, lion hunting gazelle, etc.

7 0

3 years ago

A body is projected upward at an angle of 30 degree to the horizontal at an initial speed of 200ms-.In how many seconds will it

Crazy boy [7]

Answer:

20.41 s

3534.80 m

Explanation:

In how many seconds will it reach the ground?

We are given the initial velocity of the body, which is 200 m/s at a 30° angle.

We know the acceleration in the vertical direction is -9.8 m/s², assuming that the upwards/right direction is positive and the downwards/left direction is negative.

Since we are using acceleration in the y-direction, let's use the vertical component of the initial velocity.

200 · sin(30) m/s

Let's use the fact that at the top of its trajectory, the body will have a final velocity of 0 m/s.

Now we have one missing variable that we are trying to solve for: time t.

Find the constant acceleration equation that contains v₀, v, a, and t.

v = v₀ + at

Substitute known values into the equation.

0 = 200 · sin(30) + (-9.8)t
-200 · sin(30) = -9.8t
t = 10.20408163

Recall that this is only half of the body's trajectory, so we need to double the time value we found to find the total time the body is in the air.

2t = 20.40816327

The body will reach the ground in 20.41 seconds.

How far from the point of projection would it strike?

We want to find the displacement in the x-direction for the body.

Let's find the constant acceleration equation that contains time t, that we just found, and displacement (Δx).

Δx = v₀t + 1/2at²

Substitute known values into the equation. Remember that we want to use the horizontal component of the initial velocity and that the acceleration in the x-direction is 0 m/s².

Δx = (200 · cos(30) · 20.40816327) + 1/2(0)(20.40816327)²
Δx = 3534.797567

The body will strike 3534.80 m from the point of projection.

4 0

2 years ago

You want to find out how many atoms of the isotope 65Cu are in a small sample of material. You bombard the sample with neutrons

serious [3.7K]

Answer:

a) number of copper atoms 65 (⁶⁵Cu) is 7.692 10⁶ atoms

b) m_total Cu = 1.585 10⁹ u = 2.632 10⁻¹⁸ kg

Explanation:

a) For this exercise let's start by using the radioactive decay ratio

N = N₀ $e^{- \lambda t}$ o e - lambda t

The half-life time is defined as the time it takes for half of the radioactive (activated) atoms to decay, therefore after two half-lives there are

N = ½ (½ N₀) = ¼ N₀

N₀ = 4 N

in each decay a photon is emitted so we can use a direct rule of proportions. If an atom emits a photon it has Eo = 1,04 Mev, how many photons it has energy E = 10,000 MeV

# _atoms = 1 atom (photon) (E / Eo)

# _atoms = 1 10000 / 1.04

# _atoms = 9615,4 atoms

N₀ = 4 #_atoms

N₀ = 4 9615,4

N₀= 38461.6 atoms

in the exercise indicates that half of the atoms decay in this way and the other half decays directly to the base state of Zinc, so the total number of activated atoms

N_activated = 2 # _atoms

N_activated = 2 38461.6

N_activated = 76923.2

also indicates that 1% = 0.01 of the nuclei is activated by neutron bombardment

N_activated = 0.01 N_total

N_total = N_activated / 0.01

N_total = 76923.2 / 100

N_total = 7.692 10⁶ atoms

so the number of copper atoms 65 (⁶⁵Cu) is 7.692 10⁶

b) the natural abundance of copper is

⁶³Cu 69.17%

⁶⁵Cu 30.83%

Let's use a direct proportion rule. If there are 7.692 10⁶ ⁶⁵Cu that represents 30.83, how much ⁶³Cu is there that represents 69.17%

# _63Cu = 69.17% (7.692 10⁶ / 30.83%)

# _63Cu = 17.258 10⁶ atom ⁶³Cu

the total amount of comatose is

#_total Cu = #_ 65Cu + # _63Cu

#_total Cu = (7.692 + 17.258) 10⁶

#_total Cu = 24.95 10⁶

the atomic mass of copper is m_Cu = 63.546 u

m_total = #_totalCu m_Cu

m_total = 24.95 10⁶ 63,546 u

m_total = 1.585 10⁹ u

let's reduce to kg

m_total Cu = 1.585 10⁹ u (1,66054 10⁻²⁷ kg / 1 u)

m_total Cu = 2.632 10⁻¹⁸ kg

8 0

3 years ago

When a projectile reaches the highest point the vertical component of the acceleration is:

Mazyrski [523]

Answer:

The acceleration is g.

Taking the upward direction as positive

V = Vy y - 1/2 g t^2

Taking the downward direction as positive

V = -V y + 1/2 g t^2

One can choose either direction as positive, but the acceleration is

the same as g (it is g) while the projectile is in the air.

6 0

3 years ago

Organisms produce their own energy or provide energy for other organisms in a food chain. Many different organisms can be found

miskamm [114]

The correct answer is TRUE. Organisms produce their own energy or provide energy for other organisms in a food chain. Many different organisms can be found in the Amazon rainforest in South America. Organisms in this biome include a variety of trees, plants, insects, fish, birds, reptiles, and mammals. The jaguar and anaconda are among the largest predators found in the Amazon.

6 0

3 years ago