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
pentagon [3]
3 years ago
15

An α particle is a helium nucleus and has mass 4 u, which is "4 atomic units." suppose it collides head-on in an elastic collisi

on with a stationary gold nucleus inside a block of material. the mass of a gold nucleus is 197 u. what percentage of the α's kinetic energy is lost in this collision
Physics
1 answer:
Alexxx [7]3 years ago
6 0

velocity of helium nuclei after it collide with stationary gold nuclei will be calculated by momentum conservation and coefficient of restitution

here we have

m_1 u = m_1 v_1 + m_2 v_2

also we know that

v_2 - v_1 = u

by solving above two equations

v = \frac{m_1 - m_2}{m_1 + m_2} u

v = \frac{4u - 197u}{4u + 197u} u

v = 0.96u

now loss in kinetic energy of alpha particle will be

Loss = \frac{0.5mu^2 - 0.5mv^2}{0.5mu^2}

Loss =1 -  \frac{v^2}{u^2}

Loss =1 -  0.96^2

Loss =0.078 = 7.8%

You might be interested in
Difference between output work and input work​
Harrizon [31]

An input device sends information to a computer system for processing, and an output device reproduces or displays the results of that processing. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device.

Hope it helps!

8 0
3 years ago
If 6.24×10¹⁸ electron pass through a wire in 1s how many pass through it during a time interval of 2hr, 47min and 10s
levacccp [35]
Answer = 6.24x10^18 x ((2 x 3600) + (47 x 60) + 10)
3 0
3 years ago
Since the universe is infinite, the probability of events and reoccurrence is infinite. So that means that there is a chance, if
il63 [147K]

Answer:

That insane it might be true because  a planet sometimes quoted to be an Earth 2.0 or Earth's Cousin based on its characteristics; also known by its Kepler Object of Interest designation KOI-7016.01) is an exoplanet orbiting the Sun-like star Kepler-452 about 1,402 light-years (430 pc) from Earth in the constellation Cygnus.

Explanation:

7 0
2 years ago
Consider two objects (Object 1 and Object 2) moving in the same direction on a frictionless surface. Object 1 moves with speed v
Semenov [28]

Answer:

A)Object 1 has the greater magnitude of its momentum.

B)The objects 2 have the greater kinetic energy.

Explanation:

For object 1 :

v₁ = v  ,m₁ = 2 m

For object 2 :

v_2=2\sqrt{v} ,m₂=m

We know that linear momentum given as

P = M V

M=Mass , V=Velocity

For object 1 :

P₁ =m₁ v₁

P₁ =2 m v

For object 2

P_2=m_2v_2

P_2=2m\sqrt {v}

We can say that object 1 have more momentum.

The kinetic energy

KE_1=\dfrac{1}{2}m_1v_1^2

KE_1=\dfrac{1}{2}\times 2m\times v^2

KE_1=mv^2

KE_2=\dfrac{1}{2}m_2v_2

KE_2=\dfrac{1}{2}\times m\times 4v^2

KE_2=2mv^2

Therefore both the object 2 have higher kinetic energy.

7 0
3 years ago
A 1.2 g pebble is stuck in a tread of a 0.76 m diameter automobile tire, held in place by static friction that can be at most 3.
Maksim231197 [3]

Answer:

v=33.764m/s

Explanation:

Given data

Mass m=1.2 g=0.0012 kg

diameter d=0.76 m

Friction Force F=3.6 N

To find

Velocity v

Solution

From the Centripetal force we know that

F_{c}=\frac{mv^{2} }{r}

Where m is mass

v is velocity

r is radius

Substitute the given values to find velocity v

So

F_{c}=\frac{mv^{2} }{r}\\v^{2}=\frac{F_{c}(r)}{m}\\ v=\sqrt{\frac{F_{c}(r)}{m}}\\ v=\sqrt{\frac{F_{c}(diameter/2)}{m}}\\v=\sqrt{\frac{(3.6N)(0.76/2)m}{(0.0012kg)}}\\v=33.764m/s

4 0
3 years ago
Other questions:
  • Which statement describes one feature of a closed circuit? Charges do not flow. Bulbs will not shine. The circuit is broken. The
    13·2 answers
  • Nuclear decay occurs according to first-order kinetics. Cobalt-60 decays with a rate constant of 0.131 years−1. After 5.00 years
    9·1 answer
  • Which statement accurately classifies helium?
    10·1 answer
  • The peak intensity of radiation from Mars is about 14,000 nm. In what spectral band is this? ultraviolet, radio waves, visible l
    6·2 answers
  • A mass–spring system moves with simple harmonic motion along the x axis between turning points at x = 10x=10 cm and x_2 = 30x ​2
    13·1 answer
  • What are the maria composed of? Is this material found elsewhere in the solar system?
    8·1 answer
  • A battery consists of five dry cells connected in series. If the voltage developed by each cell is 1.5 V, the total voltage deve
    5·2 answers
  • 1. What causes some atoms of the same element<br> to have different atomic masses?
    8·2 answers
  • IM BEGGING ILL GIVE BRAINLEST PLEASEEEEEEE HELP ME Distance and amount of charge are factors that determine which of the
    9·1 answer
  • Which purpose does a light bulb serve in a circuit?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!