All categories

4 years ago

I WILL GIVE BRAINLIESTT!!!

1 answer:

4 0

de Broglie's wave equation describes that particles have wave properties.

Equation is
λ = h/mv

Where λ is the wave length of the particle (m), h is the Planck's constant (6.62607 x 10⁻³⁴J s), m is the mass of a particle (kg) and v is the velocity (m/s).

λ = ?
h = 6.62607 x 10⁻³⁴ J s
m = 2.00 g = 0.002 kg
v = 2 m/s

By substitution,
λ = 6.62607 x 10⁻³⁴ J s / (0.002 kg x 2 m/s)
λ = 1.66 x 10⁻³¹ m

Hence, the wavelength of the 2.00 g ball is 1.66 x 10⁻³¹ m.

You might be interested in

What is the pOH of a 0.150 M solution of potassium nitrite? (Ka HNO2 = 4.5 x 10−4 )

yanalaym [24]

Answer:

11.9 is the pOH of a 0.150 M solution of potassium nitrite.

Explanation:

Solution : Given,

Concentration (c) = 0.150 M

Acid dissociation constant = $k_a=4.5\times 10^{-4}$

The equilibrium reaction for dissociation of $HNO_2$ (weak acid) is,

$HNO_2+H_2O\rightleftharpoons NO_2^-+H_3O^+$

initially conc. c 0 0

At eqm. $c(1-\alpha)$ $c\alpha$ $c\alpha$

First we have to calculate the concentration of value of dissociation constant $(\alpha )$ .

Formula used :

$k_a=\frac{(c\alpha)(c\alpha)}{c(1-\alpha)}$

Now put all the given values in this formula ,we get the value of dissociation constant $(\alpha )$ .

$4.5\times 10^{-4}=\frac{(0.150\alpha)(0.150\alpha)}{0.150(1-\alpha)}$

$4.5\times 10^{-4} - 4.5\times 10^{-4}\alpha =0.150\alpha ^2$

$0.150\alpha ^2+4.5\times 10^{-4}\alpha-4.5\times 10^{-4}=0$

By solving the terms, we get

$\alpha=0.0533$

No we have to calculate the concentration of hydronium ion or hydrogen ion.

$[H^+]=c\alpha=0.150\times 0.0533=0.007995 M$

Now we have to calculate the pH.

$pH=-\log [H^+]$

$pH=-\log (0.007995 M)$

$pH=2.097\approx 2.1$

pH + pOH = 14

pOH =14 -2.1 = 11.9

Therefore, the pOH of the solution is 11.9

4 0

4 years ago

Volume can you measured in liters or cubic meters

evablogger [386]

Volume can be measures in liters

5 0

3 years ago

How does the appearance of the protist differ from that of the onion sample?

lana [24]

The appearance of the protist differ from that of the onion sample due to the presence of motile structures.

<h3>What is a Protist?</h3>

This is an eukaryote which could be unicellular or multicellular and examples include protozoa etc.

The major difference between a protist and onion sample is that protists have motile structures such as flagella, cilia etc while plant cells such as onions don't have.

Read more about Protist here brainly.com/question/2169979

#SPJ1

8 0

2 years ago

Somethings wrong with Tommy’s left eye. You have to examine it very carefully. Can you bring the parts of the eye in the correct

Lubov Fominskaja [6]

Answer:

cornea - Iris - lens - retina.( From outside to inside)

Explanation:

The correct order from outside to inside is cornea - Iris - lens - retina.

The cornea is the front part of the eye. It helps the eye to focus on light. It is transparent.

The Iris is located at the back of the cornea.The quantity of light that falls on the eye is determined by the Iris. The Iris is colored.

Lens allows light to be focused on the retina. It is behind the Iris.

The retina is the part of the eye that senses light. The retina sends the light signal it senses to the brain for interpretation. It is the innermost if all the options given.

3 0

4 years ago

What is the name of the compound HPO4

xeze [42]

Answer:

wsde4frtghyujkopldfgyhuji

Explanation:

3 0

3 years ago

Read 2 more answers