All categories

1 year ago

For a proton (mass = 1.673 x 10–27 kg) moving with a velocity of 2.83 x 104 m/s, what is the de Broglie wavelength (in pm)?

Physics

1 answer:

Oduvanchick [21]1 year ago

6 0

Answer:

The value of de Broglie wavelength is 14.0 pm

Explanation:

Given;

mass of proton, m = 1.673 x 10⁻²⁷ kg

velocity of the proton, v = 2.83 x 10⁴ m/s

De Broglie wavelength is given as;

$\lambda = \frac{h}{mv}$

where;

h is planck's constant = 6.626 x 10⁻³⁴ kgm²/s

m is mass of the proton

v is the velocity of the proton

$\lambda = \frac{6.626*10^{-34}}{(1.673*10^{-27})(2.83*10^4})} \\\\\lambda = 1.40 *10^{-11} \ m\\\\\lambda = 14.0 \ pm$

Therefore, the value of de Broglie wavelength is 14.0 pm

You might be interested in

A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well. the farmer uses a force f1=57.5 n to pu

AlladinOne [14]

The first problem cannot be solve because you did give the distance or length of the rope, because work = distance x force. i can only solve the the second problem. since the bucket is moving up then force due to gravity is going down, then the net force is:
Fnet = F1 - Fg
where Fg = mg
g is the accelaration due to gravity ( 9.81 m/s^2)
Fnet = 57.5 N - (3.9 kg)(9.81) N
Fnet = 19.24 N

4 0

1 year ago

Three thermometers are in the same water bath. After thermal equilibrium is established, it is found that the Celsius thermomete

Degger [83]

Answer:

C) the Fahrenheit thermometer is incorrect

Explanation:

Since

1) K = °C + 273

2) °F = 9/5 °C + 32

for 0 °C

1) K = 0°C + 273 = 273 K

2) °F = 9/5 * 0°C + 32 = 32 °F

Thus the Kelvin thermometer measurement coincides with the Celsius measurement but not with the °F . On the other hand, if the Fahrenheit measurement is right, the Celsius thermometer and the Kelvin one should be wrong.

Therefore is more reasonable to assume that one thermometer failed (the one of Fahrenheit and both Kelvin and Celsius are right ) that 2 thermometers ( Celsius and Kelvin thermometers fail and the one of Fahrenheit is right)

3 0

1 year ago

The bottom of the inner curve of a hook is called

padilas [110]

Slip hook or blunt hook

8 0

2 years ago

Which statements best describe x-rays? check all that apply. x-rays are electromagnetic waves. x-rays are longitudinal waves. x-

laiz [17]

X ray is one of the electromagnetic waves.

As per Clark Maxwell's electromagnetic theory, all the electromagnetic waves move with the velocity of light i.e c= 3×10^8 m/s

In case of electromagnetic waves,the electric field and magnetic field are perpendicular to each other as well as perpendicular to the direction of propagation.The electromagnetic waves exhibit the property of polarisation. Hence they are transverse in nature.

Hence the best statements about X- ray will be-

1- X -rays are electromagnetic waves

2-X-rays are transverse transverse waves

3- X- rays travel at the speed of light.

5 0

1 year ago

Read 2 more answers

A backpacker collects snow at 0°C, and places it in a cooking pot on a camp stove. It takes 643 kJ of heat energy to melt the sn

Nitella [24]

Answer:

The mass of snow that the backpacker collected is: <em>D) 855g</em>

Explanation:

To boiling the water, the cooking pot requires 643kJ. This heat is due to the heat to melt the water and the heat to bring the water to boiling point.

The heat to melt the water is:

q = ΔHfusion× $\frac{1mol}{18,02g}$ ×mass

And heat to bring water to boiling point is:

q = C×mass×ΔT

Where C is specific capacity of liquid water and ΔT is change in temperature (100°C, from melting point to boling point)

As the required energy required is 643000J:

643000J = ΔHfusion× $\frac{1mol}{18,02g}$ ×mass + C×mass×ΔT

643000J = 6020J/mol× $\frac{1mol}{18,02g}$ ×mass + 4,18J/g°C×mass×100°C

643000J = 334J/g×mass + 418J/g×mass

643000J = 752J/g×mass

855g = mass

<em>The mass of snow that the backpacker collected is 855g</em>

I hope it helps!

7 0

1 year ago