All categories

3 years ago

Which statement is true about trends shown on the electromagnetic scale.

2 answers:

6 0

Remember that λ, or wavelength, is proportional to (1/f), where f=frequency. That means that wavelength and frequency are inversely related. When one goes up, the other goes down, and vice versa. That means answers C and D are incorrect because those answers have wavelength and frequency in a direct relationship.

Radiant energy is directly proportional to frequency. When frequency increases, radiant energy increases. That means A) As wavelength decreases, radiant energy and frequency increase is the correct answer.

kicyunya [14]3 years ago

4 0

Answer:

A: As wavelength decreases, radiant energy and frequency increse

You might be interested in

Which polynomials, given in square inches, could represent the area of a square with whole number side lengths if x is a whole n

erica [24]

Answer: The correct answers are $x^2-9\text{ and }x^2-100$

Explanation:

To find the polynomials which could represent the are of a square having side x greater than 2, we need to find the value of 'x' for all the given polynomials.

From the given options:

1. $x^2-9$

$x^2=9\\x=\sqrt{9}\\x=3,-3$

x = -3 is ignored.

2. $x^2-100$

$x^2=100\\x=\sqrt{100}\\x=\pm10\\x=10,-10$

x = -10 is ignored

3. $x^2-4x+4$

To solve this we use the quadratic formula:

$\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Putting values of a, b and c, we get:

$x=\frac{-(-4)\pm\sqrt{(-4)^2-4(1)(4)}}{2\times 1}\\x=2,2$

As, x comes out to be 2 and is not greater than 2. Hence, this is not considered.

4. $x^2+10x+25$

Solving for 'x' by splitting the middle term:

$\Rightarrow x^2+5x+5x+25\\\Rightarrow x(x+5)+5(x+5)\\x=-5,-5$

Hence, this is ignored.

5. $x^2+15x+36$

Solving for 'x' by splitting the middle term:

$\Rightarrow x^2+12x+3x+36\\\Rightarrow x(x+12)+3(x+12)\\x=-12,-3$

Hence, this is ignored.

So, the correct polynomials are $x^2-9\text{ and }x^2-100$

3 0

3 years ago

Read 2 more answers

The specific heat of water is 4.184Jg ∘C. Determine the final temperature when 600.0 g water at 75.5∘C absorbs 5.90×104 J of ene

sesenic [268]

Answer:

$T_2=98.5^{\circ}$

Explanation:

Given that,

The specific heat of water is 4.184Jg°C

Mass, m = 600 g

Initial temperature, T₁ = 75.5°C

We need to find the final temperature. We know that heat absorbed is given by :

$Q=mc\Delta T\\\\Q=mc(T_2-T_1)\\\\\dfrac{Q}{mc}=(T_2-T_1)\\\\\\T_2=\dfrac{Q}{mc}+T_1\\\\T_2=\dfrac{5.9\times 10^4}{600\times 4.184}+75\\\\T_2=98.5^{\circ}$

So, the final temperature is equal to $98.5^{\circ}$ .

3 0

3 years ago

What is the concentration of a solution?

Anon25 [30]

Concentration Definition. In chemistry, concentration refers to the amount of a substance per defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution. Concentration usually is expressed in terms of mass per unit volume.

7 0

3 years ago

During the light-independent reaction, carbon dioxide is fixed by adding it to a A. 2-carbon compound B. 3-carbon compound C. 4-

Scrat [10]

During the light independent reaction, carbon dioxide is fixed by adding it to a 5-carbon compound

8 0

4 years ago

Read 2 more answers

Calculation of ph from hydrogen ion concentration what is the ph of a solution that has an h1 concentration of (a) 1.75 3 1025 m

faltersainse [42]

<h2>Solutions:</h2>

Case a: Finding pH for [H⁺] = 1.75 × 10⁻⁵ mol/L :

As we know pH is given as,

pH = -log [H⁺]

Putting value,

pH = -log [1.75 x 10⁻⁵]

pH = 4.75

Case b: Finding pH for [H⁺] = 6.50 × 10⁻¹⁰ mol/L :

As we know pH is given as,

pH = -log [H⁺]

Putting value,

pH = -log [6.50 × 10⁻¹⁰]

pH = 9.18

Case c: Finding pH for [H⁺] = 1.0 × 10⁻⁴ mol/L :

As we know pH is given as,

pH = -log [H⁺]

Putting value,

pH = -log [1.0 × 10⁻⁴]

pH = 4

Case d: Finding pH for [H⁺] = 1.50 × 10⁻⁵ mol/L :

As we know pH is given as,

pH = -log [H⁺]

Putting value,

pH = -log [1.50 × 10⁻⁵]

pH = 4.82

7 0

3 years ago