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valina [46]
3 years ago
10

A proton with an initial speed of 800000 m/s is brought to rest by an electric field.

Physics
1 answer:
valkas [14]3 years ago
3 0

A) Higher potential

In order to stop the proton, it must be that the proton is moving against the direction of the electric field (=towards a positive charge, since it feels a repulsive force). This also means that the proton is moving from a region at lower electric potential to a region at higher electric potential (in fact, the electric potential is maximum near to the charge source of the field and it decreases as we move far away from it).

B) 3340 V

When the proton stops, the initial kinetic energy of the proton has been all converted into electric potential energy due to the field:

K = \Delta U\\\frac{1}{2}mv^2 = q\Delta V

where

m=1.67\cdot 10^{-27}kg is the mass of the proton

v=8\cdot 10^5 m/s is the proton's initial speed

q=1.6\cdot 10^{-19}C is the proton's charge

\Delta V is the potential difference

Solving for \Delta V, we find

\Delta V=\frac{mv^2}{2q}=\frac{(1.67\cdot 10^{-27}kg)(8\cdot 10^5 m/s)^2}{2(1.6\cdot 10^{-19}C)}=3340 V

C) 3340 eV

Since the proton has charge of q = +1 e, the electric potential energy gained by the proton is

\Delta U=q\Delta V=(1 e)(3340 V)=3340 eV

And due to the conservation of energy, the initial kinetic energy of the proton must be equal to this value.

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Answer:

a)Velocity of car =v=16 m/s

b)Force against the track at point B=1.15*10^{4}N

Explanation:

Given mass of roller coaster=m=350 kg

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Position of B=Hb=12 m

Net potential energy=mg(ha-hb)

Net potential energy=(350)(9.80)(25-12)

Net potential energy=44590 J

Using energy conservation

net kinetic energy=net potential energy

(1/2)mv^2=mg(ha-hb)

m=350

velocity=v=16 m/s

b)There two force acting,centripetal force upward and gravity downward.

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Net force=(mv^2/r)-mg

Net force=14933.33-3430

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2 years ago
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Explain, using the kinetic theory of matter, why liquids and solids are more denser than gases
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5 0
3 years ago
When an object in simple harmonic motion is at its maximum displacement, its____________ is also at a maximum.
Ivan

When an object in simple harmonic motion is at its maximum displacement, its <u>acceleration</u> is also at a maximum.

<u><em>Reason</em></u><em>: The speed is zero when the simple harmonic motion is at its maximum displacement, however, the acceleration is the rate of change of velocity. The velocity reverses the direction at that point therefore its rate of change is maximum at that moment. thus the acceleration is at its maximum at this point</em>

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irinina [24]

Answer:

0.655 m

13.468°C

Explanation:

v = Speed of sound at 20.0°C = 343 m/s (general value)

For one both end open we have the expression

L=\dfrac{\lambda_1}{2}\\\Rightarrow L=\dfrac{\dfrac{v}{f_1}}{2}\\\Rightarrow L=\dfrac{\dfrac{343}{261.6}}{2}\\\Rightarrow L=0.655581039755\ m

The length of the flute is 0.655 m

Beat frequency is given by

\Delta f=f_1-f_2\\\Rightarrow 3=261.6-f_2\\\Rightarrow f_2=261.6-3\\\Rightarrow f_2=258.6\ Hz

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T=273(\dfrac{v}{331})^2\\\Rightarrow T=273(\dfrac{339.066513761}{331})^2\\\Rightarrow T=286.468227799\ K=286.468227799-273=13.468227799^{\circ}C

The temperature of the room is 13.468°C

4 0
3 years ago
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