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Oksi-84 [34.3K]
3 years ago
3

A scientist wants to investigate several problems. In which of the following situations is using a simulation LEAST suitable for

solving a problem?
a. When a scientific study requires performing a large number of trials that need to be conducted very quickly
b. When the solution to the problem requires real-world data inputs that are continually measured at regular intervals.
c. When performing an experiment that would be too costly or dangerous to conduct in the real world
d. When it is considered acceptable to make simplifying assumptions when modeling a real-world object or phenomenon
Chemistry
2 answers:
DedPeter [7]3 years ago
6 0

Answer:

d

Explanation:

Source: trust me bro

Vaselesa [24]3 years ago
4 0

Answer:

A

Explanation:

got from another website

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How can you know if evolution has occured within species?​
Murrr4er [49]

You can use the HWE (Hardy Weinberg Equilibrium) equations :

p + q = 1

p^2 + 2pq + q^2 = 1

If the allele combinations do not equal one after a while, evolution has occurred.

4 0
3 years ago
Specify the l and ml values for n = 4.
Bumek [7]

Answer : The specify the l and ml values for n = 4 are:

At l = 0,  m_l=0

At l = 1,  m_l=+1,0,-1

At l = 2,  m_l=+2,+1,0,-1,-2

At l = 3,  m_l=+3,+2,+1,0,-1,-2,-3

Explanation:

There are 4 quantum numbers :

Principle Quantum Numbers : It describes the size of the orbital. It is represented by n. n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as m_l. The value of this quantum number ranges from (-l\text{ to }+l). When l = 2, the value of m_l will be -2, -1, 0, +1, +2.

Spin Quantum number : It describes the direction of electron spin. This is represented as m_sThe value of this is +\frac{1}{2} for upward spin and -\frac{1}{2} for downward spin.

As we are given, n = 4 then the value of l and ml are,

l = 0, 1, 2, 3

At l = 0,  m_l=0

At l = 1,  m_l=+1,0,-1

At l = 2,  m_l=+2,+1,0,-1,-2

At l = 3,  m_l=+3,+2,+1,0,-1,-2,-3

6 0
3 years ago
Match the element with its oxidation number (charge).
Angelina_Jolie [31]

Answer:

The answer is in the problem

Explanation:

As general rule of number of oxygen is -2:

O → -2

Alkali metals (Li, Na, K) are always +1

Na → +1

Alkali earth methals (Be, Mg, Ca...) are always +2

Ca → +2

The halogen group (F, Cl, Br...) is always -1

F → -1

The oxidation number of Si (+/- 4)

Aluminium is, usually +3

And to complete the octet rule in nitrogen, 3 electrons are required. That means:

N → -3

8 0
3 years ago
Using the Rydberg formula, calculate the initial energy level when an electron in a hydrogen atom transitions into n= 2 and emit
EleoNora [17]

Answer:

1

Explanation:

Using the Rydberg formula as:

\frac {1}{\lambda}=R_H\times Z^2\times (\frac {1}{n_{1}^2}-\frac {1}{n_{2}^2})

where,

λ is wavelength of photon

R = Rydberg's constant (1.097 × 10⁷ m⁻¹)

Z = atomic number of atom

n₁ is the initial final level and n₂ is the final energy level

For Hydrogen atom, Z= 1

n₂ = 2

Wavelength = 410.1 nm

Also,

1 nm = 10⁻⁹ m

So,

Wavelength = 410.1 × 10⁻⁹ m

Applying in the formula as:

\frac {1}{410.1\times 10^{-9}}=1.097\times 10^7\times 1^2\times (\frac {1}{n_{1}^2}-\frac {1}{2^2})

Solving for n₁ , we get

n₁ ≅ 1

3 0
4 years ago
Read 2 more answers
Which of the following correctly describes a mixture? (4 points) Group of answer choices The particles are chemically bonded tog
Zanzabum

Answer:

The particles have no set ratio for how to combine, and they can be separated by physical means.

Explanation:

5 0
3 years ago
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