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ehidna [41]
4 years ago
15

Consider electrons of kinetic energy 6.0 eV and 600 keV. For each electron, find the de Broglie wavelength, particle speed, phas

e velocity (speed), and group velocity (speed). Comment on the relationship between particle velocity, phase velocity and group velocity.

Physics
1 answer:
irinina [24]4 years ago
5 0

Answer:

For 6.0 eV

0.5 nm, 1.45*10^6 m/s, 6.17*10^10 m/s, 1.45*10^6 m/s

For 600 eV

1.26*10^-3 nm, 2.66*10^8 m/s, 3.37*10^8 m/s, 2.66*10^8 m/s

Explanation:

See attachment for calculation

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Bess [88]

Answer:

The influence of Media and Information over elections, politics and, governance.    

Explanation:

Once we used to have politicians travel to interact with citizens and meet them face to face. That is slowly fading away in place of townhalls that take place online.

Video conferencing, video calls, social media apps, and technology now make it easy to connect with a lot of people at once, across various timezones, without changing location.

Once upon a time, the Television media, Radio Media, Cable Television (all categorized as traditional media) used to be the custodian of information, hence, the chief influencers of politics and governance.

Today, the internet has made it possible for individuals or a group of people without much tech-spend to set up and garner a following that has enough power to influence governance.

Online petitions and Wikileaks, the proliferation of terrorist organizations that have strong information and technology as well as social media skills have modified forever, the way public office holders and other stakeholders involved used to look at governance.

6 0
3 years ago
How much force would it would be required to stop a 950kg car traveling at 30 M/S in 1.5 seconds
gavmur [86]

Answer:

28500

Explanation:

Force equation - F = m * a

F = 950 * 30

F = 28500

7 0
3 years ago
What is the equation used to calculate the total amount of energy used by an appliance?
charle [14.2K]

Answer:

Power = Current × Voltage

Explanation:

Units:

Power = Watts

Current = Àmperes

Voltage = Volts

8 0
3 years ago
A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride.
Vsevolod [243]

Answer:

1.59 g/mL

Explanation:

Mass of CCl₄ = mass of flask and CCl₄ − mass of empty flask

m = 703.55 g − 345.8 g

m = 357.75 g

Density = mass / volume

d = 357.75 g / 225 mL

d = 1.59 g/mL

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tamaranim1 [39]

Since the lamps are identical, the current divides equally through them... 0.6A through each lamp.

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3 years ago
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