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lesantik [10]
3 years ago
12

If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed?

Physics
1 answer:
sweet [91]3 years ago
4 0

Answer:

Speed of the electron will be v=5.896\times 10^7m/sec

Explanation:

We have given that charge on electron e=1.6\times 10^{-19}C

Mass of electron m=9.11\times 10^{-31}kg

Potential difference = V=9.9KV=9.9\times 10^3volt

Now according to energy conservation eV=\frac{1}{2}mv^2

1.6\times 10^{-19}\times 9.9\times 10^3=\frac{1}{2}\times 9.11\times 10^{-31}v^2

v=5.896\times 10^7m/sec

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cestrela7 [59]

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3 0
4 years ago
Alligators and other reptiles don't use enough metabolic energy to keep their body temperatures constant. they cool off at night
drek231 [11]
To compute for the heat, Q needed to be absorbed or released,  we need

Q = mc\Delta T

where m is the mass of the alligator, \Delta T is the change in temperature, and c is the specific heat of the alligator's body. Plugging in all the information we have,

Q = (300 kg)(3400 kJ/K)(30-25) = 5100000 J

Recall that 1 Watt = 1 J/s, thus time needed to absorb radiation from the sun is

t = \frac{Q}{W}\\ t = 4250 seconds

That means it takes 4250 seconds for the alligator to warm up to be able to absorb the radiation from the sun.

Answer: 4250 seconds



4 0
4 years ago
If friction is increased then the amount of potential energy that becomes kinetic energy does what
emmasim [6.3K]
Increases as well since more friction causes less speed and thus less potential energy and more kinetic energy.
8 0
4 years ago
A chicken is running in a circular path with an angular speed of 1.52 rad/s. How long does it take the chicken to complete one r
Zielflug [23.3K]

Answer: approximately 4 seconds

Explanation:

1.52 is approximately pi/4

2pi rad is 360°

Pi/4 rad is 90°

So the chicken runs one-fourth of the path in one second so it runs the hole path in four minutes

7 0
4 years ago
Types of government
igor_vitrenko [27]

Answer:

Explanation:

The different types of government include a direct democracy, a representative democracy, socialism, communism, a monarchy, an oligarchy, and an autocracy

3 0
3 years ago
Read 2 more answers
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