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OlgaM077 [116]
4 years ago
15

A 25eV electron has a speed of

Physics
2 answers:
dexar [7]4 years ago
5 0

Answer : <em>3 x 106m/sec</em>

fgiga [73]4 years ago
3 0

Answer: 2.963*10⁶ m/s

Explanation:

Work done = kinetic energy

K.E = eV

½mv² = eV

v² = 2eV / m.

Mass of an electron = 9.11*10-³¹kg

Energy of an electron = 1.60*10-¹⁹J

v² = (2 * 25 * 1.60*10-¹⁹) / 9.11 * 10‐³¹

v = 2.96*10⁶m/s

Note : you'll have to take the square root of velocity (v)

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7 0
3 years ago
A particle moves along the x axis. It is initially at the position 0.180 m, moving with velocity 0.060 m/s and acceleration -0.3
shusha [124]

Answer:

a

  x_2 = -2.3356

b

 v = -1.384 \ m/s

Explanation:

From the question we are told that

  The initial position of the particle is  x_1 = 0.180 \ m

  The initial  velocity of the particle is  u = 0.060  \  m/s

  The acceleration is   a = -0.380 \  m/s^2

   The time duration is  t = 3.80  \ s

Generally from kinematic equation

    v = u + at

=>  v = 0.060 + (-0.380 * 3.80)

=>  v = -1.384 \ m/s

Generally from kinematic equation

   v^2 = u^2 + 2as

Here s is the distance covered by the particle, so

   (-1.384)^2 = (0.060)^2 + 2(-0.380)* s

=>  s = -2.5156 \ m

Generally the final position of the particle is  

    x_2 = x_1 + s

=>   x_2 = 0.180 + (-2.5156)

=>   x_2 = -2.3356

6 0
3 years ago
I need help with one through six please
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Answer:

1] 8500000 = <u>8.5 × 10⁶</u>

2] .000072 = <u>7.2 × 10⁻⁵</u>

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4] 2.8 × 10⁻³ = <u>0.0028</u>

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Explanation:

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3 years ago
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Answer:

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