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Fittoniya [83]
2 years ago
11

Jimmy held the end of a metal bar over a fire while holding on to the opposite end. After a few minutes, the end he was holding

began to get very hot. Which of the following processes correctly describes the heat traveling from one end of the bar to the other?
Physics
1 answer:
nikitadnepr [17]2 years ago
6 0

Answer:

Hey mate....

Explanation:

This is ur answer....

<em></em>

<em>The heat is transferred by the process of conduction of heat. </em>

<em> It is given that, Jimmy held the end of a metal bar over a fire while holding on to the opposite end.     </em>

<em> After some time, the end he was holding began to get very hot. </em>

<em> The process of traveling heat from one end of the bar to the other end is called conduction. It is the process of transfer of heat by the interaction of particles and motion of electrons.</em>

<em></em>

Hope it helps!

Brainliest pls!

Follow me! :)

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A proton circulates in a cyclotron, beginning approximately at rest at the center. Whenever it passes through the gap between de
nevsk [136]

Answer:

(a) 120 eV

(b) 12.840 keV

(c) 0.466%

Solution:

As per the question:

The potential difference between the dees, V = 120 V

No. of passes, n = 107

Now,

(a) The potential energy can be given as 'qV' but by the principle of conservation of energy, this energy with each pass is converted into the kinetic energy of the particle which is given as 120 eV

Thus

The increase in Kinetic energy, \Delta KE = 120\ eV

(b) Kinetic energy on completion of 107 passes is given by:

KE = n\Delta KE = 107\times 120\ eV = 12.840\ keV

(c) The velocity of the particle can be calculated from its kinetic energy:

KE = \frac{1}{2}m_{p}v^{2} = 12.840\ keV = 120n\ eV

Thus

v = \sqrt{\frac{240ne}{m_{p}}}

Thus radius can be given as:

R = \frac{m_{p}}{Bq}(\sqrt{\frac{240ne}{m_{p}}})

where

B = Magnetic field

m_{p} = mass of proton

Therefore, we can write that:

R = \sqrt{n}

Thus the percentage increase in radius from n = 107 to n = 108 is given by:

\Delta R(in\ percent) = \frac{\sqrt{108} - \sqrt{107}}{\sqrt{107}}\times 100 = = 0.466 %

5 0
4 years ago
A small aircraft accelerated down a runway at 4.0 m/s²
Radda [10]

Given data in the problem :-

  • Acceleration (a) = 4.0 m/s^2
  • Initial velocity (u) = 0 m/s
  • Final velocity (v) = 34 m/s
  • Distance travelled by aircraft (S) =  ?

From Newton's Laws of Motion we know that ,

v = u + at  [t = Time taken by aircraft to cover the distance]

⇒ 34 = 0 + 4t

⇒ t = 34/4 s

∴  t = 8.5 s

From Newton's Laws of Motion we also know that ,

S = u.t + 1/2a.t^2

⇒ S = 0×8.5 + 1/2 × 4 × (8.5)^2 m

∴  S = 144.50 m

Thus the distance travelled by the aircraft while accelerating is 144.50 meter .

4 0
2 years ago
What is the primary mode of energy transfer from hot coffee inside a Thermos bottle to the environment? View Available Hint(s) P
Keith_Richards [23]

Answer Part A: radiation

Part B: conduction

Part C: conduction

Part D: conduction

Part E: conduction

Part F: radiation

Part G::radiation

Part H : convection

Explanation:conduction is heat transfer through direct contact

Convection is through molecules or particles of water or air current

Radiation is heat transfer through empty space .

8 0
4 years ago
Please help me plzzzzz
Andrews [41]

Answer:

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6 0
3 years ago
A baseball (m=145g) traveling 39 m/s moves a fielder's glove backward 23 cm when the ball is caught.
Grace [21]

The average force exerted by the ball on the glove is 480 N.

<h3>What is the force exerted by the ball on the glove?</h3>

The average force exerted on the glove by the ball is equal in magnitude to the force on the ball.

  • Force = mass * acceleration

mass = 145 g = 0.145 kg

Acceleration of the baseball, a = (v² - u²)/2s

where:

v is final velocity = 0

u is initial velocity = 39 m/s

s is distance = -23 cm = 0.23 m

a = (0 - 39²)/2(-0.23)

a = 3306.52 m/s²

Force = 0.145 * 3306.52

Force = 479.4 N

Average force = 480 N

In conclusion, force is derived from the product of mass and acceleration.

Learn more about force at: brainly.com/question/12970081

#SPJ1

5 0
2 years ago
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