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3 years ago

12

An element is made up of

2 answers:

Greeley [361]3 years ago

8 0

Answer:

only one type of atom

Explanation:

kvv77 [185]3 years ago

3 0

Elements are made of atoms, which are particles that represent the most basic form of an element.<span> An atom is the smallest particle of an element and cannot be further divided without becoming a less complex particle; in fact, the word 'atom' comes from the Greek word "atomos," meaning 'indivisible'.</span>

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During exponential growth, the rate of growth

alekssr [168]

The answer would be D

3 0

4 years ago

Calculate the fraction of methyl isonitrile molecules that have an energy of 160.0 kJ or greater at 510 K .

soldi70 [24.7K]

Answer:

$4.0932672025\times 10^{-17}$

Explanation:

$E_a$ = Activation energy = 160 kJ

T = Temperature = 510 K

R = Universal gas constant = 8.314 J/mol K

The fraction of energy is given by

$f=e^{-\dfrac{E_a}{RT}}\\\Rightarrow f=e^{-\dfrac{160000}{8.314\times 510}}\\\Rightarrow f=4.0932672025\times 10^{-17}$

The fraction of energy is $4.0932672025\times 10^{-17}$

3 0

3 years ago

A ray of light is incident on an air/water interface.

elixir [45]

Answer:

$\theta_2=sin^{-1}(\dfrac{n_1\ sin\theta_1}{n_2})$

Explanation:

Given that,

The ray makes an angle of 32 degrees with respect to the normal of the surface.

The refractive index of air, $n_1=1$

The refractive index of water, $n_2=1.33$

Snell's law is given by :

$n_1\ sin\theta_1=n_2\ sin\theta_2$

$sin\theta_2=\dfrac{n_1\ sin\theta_1}{n_2}$

$\theta_2=sin^{-1}(\dfrac{n_1\ sin\theta_1}{n_2})$

So, option (4) is correct. Hence, this is the required solution.

3 0

3 years ago

Consider two parallel plate capacitors. The plates on Capacitor B have half the area as the plates on Capacitor A, and the plate

vichka [17]

Answer:

CB = 4.45 x 10⁻⁹ F = 4.45 nF

Explanation:

The capacitance of a parallel plate capacitor is given by the following formula:

C = ε₀A/d

where,

C = Capacitance

ε₀ = Permeability of free space

A = Area of plates

d = Distance between plates

FOR CAPACITOR A:

C = CA = 17.8 nF = 17.8 x 10⁻⁹ F

A = A₁

d = d₁

Therefore,

CA = ε₀A₁/d₁ = 17.8 x 10⁻⁹ F ----------------- equation 1

FOR CAPACITOR B:

C = CB = ?

A = A₁/2

d = 2 d₁

Therefore,

CB = ε₀(A₁/2)/2d₁

CB = (1/4)(ε₀A₁/d₁)

using equation 1:

CB = (1/4)(17.8 X 10⁻⁹ F)

<u>CB = 4.45 x 10⁻⁹ F = 4.45 nF</u>

5 0

3 years ago

A student gathered two boxes of the same size made of different materials glass and clear plastic. She placed them on a windowsi

ch4aika [34]

Answer:

dependent variable

Explanation:

8 0

3 years ago