1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ratling [72]
3 years ago
12

Through what potential difference would you need to accelerate an alpha particle, starting from rest, so that it will just reach

the surface of a 15-fmfm-diameter 238U238U nucleus
Physics
1 answer:
Svetlanka [38]3 years ago
7 0

Answer:

\Delta V    = 1.8 \times 10^7 V

Explanation:

GIVEN

diameter = 15 fm  =15 \times 10^{-15}m

we use here energy conservation

K_{i}+U_{i} =K_{f}+U_{f}

there will be some initial kinetic  energy but after collision kinetic energy will zero

K_{i} + 0 = 0 + \frac{1}{4 \pi \epsilon _{0}} \frac{(2e)(92e)}{7.5 \times 10^{-15}}

on solving these equations we get kinetic energy initial

KE_{i} = 5.65\times 10 ^{-12} \times \frac  {1 eV}{1.6 \times 10^{-19}}

KE_{i} = 35.33 J ..............(i)

That is, the alpha particle must be fired with 35.33 MeV of kinetic energy. An alpha particle with charge q = 2  e

and gains kinetic energy K  =e∆V  ..........(ii)

 by accelerating through a potential difference ∆V

Thus the alpha particle will

just reach the {238}_U nucleus after being accelerated through a potential difference  ∆V

equating (i) and second equation we get

e∆V  = 35.33 Me V

\Delta V = \frac{35.33}{2}  MV\\\Delta V    = 1.8 \times 10^7 V

You might be interested in
the deepest point in the sea is 100m below sea level .what arr the water pressure at this depth and the total pressure due to wa
fomenos

The water pressure at this depth and the total pressure due to water and atmosphere are  10.3 x 10⁵ Pa and 11.31× 10⁵ Pa.

<h3>What is pressure?</h3>

The pressure is the amount of force applied per unit area.

Atmospheric pressure, Patm =1.01×10⁵ Pa

Density of water, ρ=1030 kg/m³

Depth, h=100 m

Pressure =ρgh

P = 1030×10×100

P = 10.3 x 10⁵ Pa.

Total pressure, P=Po +ρgh

P=1.01×10⁵ + 1030×10×100

P=11.31× 10⁵ Pa

Hence, total pressure is 11.31× 10⁵ Pa.

Learn more about pressure.

brainly.com/question/12971272

#SPJ1

4 0
2 years ago
Stars form from clouds of gas and dust. As a protostar gravitationally contracts within its parent cloud, "conservation of angul
vredina [299]

Answer:

D) True. the protostar rotates more quickly.

Explanation:

If the system is isolated, the angular momentum must be retained.

Initial

        L₀ = I w₀

Final

       L_{f} = I_{f}  w_{f}

      L₀ = L_{f}

      I w₀ = I_{f}w_{f}

     w_{f}  = I /I_{f} w₀

In general, the radius of the cloud decreases significantly to form the star, the moment of inertia must decrease, so the angular velocity must increase

Let's examine the answers

A) False. The opposite happens

B) False. Speed ​​changes

C) False. For this there must be an external force, which does not exist

D) True. You agree with the above

5 0
3 years ago
What are some cunductors
sdas [7]

Answer:

copper, silver, aluminum, brass

Explanation:

you could have looked that up

4 0
3 years ago
What happens to the ratio when an excess quantity of a reactant exists?
In-s [12.5K]
The ratio will remain the same and the and the extra reactant will just be left.

Hope I helped !
7 0
3 years ago
You put a ball on the end of a string. You swing the ball
Sav [38]

Answer:

19.6 ms^{-2}

Explanation:

By the definition of  centripetal acceleration ,

a_c=\frac{V^{2} }{r}

where ,

a =  centripetal acceleration

V= velocity

r =  radius of circle

a_c=\frac{V^{2} }{r}[\\a_c=\frac{5.6^{2} }{1.6} \\=19.6 ms^{-2}

3 0
3 years ago
Other questions:
  • Tarzan swings back and forth on a long vine with a period of 7.27 s. how long is the vine?(unit=m)
    9·1 answer
  • When a 0.1-kilogram pendulum bob reaches the top of its swing, how much kinetic energy does it have?
    11·1 answer
  • What is the measurement of 29.46 cm, when rounded to three significant figures?
    6·1 answer
  • A train is approaching a signal tower at a speed of 40m/s. The train engineer sounds the 1000-Hz whistle, while a switchman in t
    11·1 answer
  • A member of the Penn State Women's Basketball team performs a jumping movement simulating that used in a jump shot. The time fro
    10·1 answer
  • If the period of a wave is 0.05 s, then what is its frequency?
    15·2 answers
  • Conservation of energy
    15·1 answer
  • You push a bike pedal 10cm and the bike moves 100cm. Calculate the Speed ratio ( show all work ) ( use the formula and divide th
    12·1 answer
  • A 100g object begins falling from a height of 5 meters. If g, the acceleration of gravity, is 10 m/s2, how long do you calculate
    5·1 answer
  • A 126- kg astronaut (including space suit) acquires a speed of 2.70 m/s by pushing off with her legs from a 1800-kg space capsul
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!