# physics

posted by .

A proton moves from a location where V = 70 V to a spot where V = -31 V.
(a) What is the change in the proton's kinetic energy?
J

(b) If we replace the proton with an electron, what is the change in kinetic energy?

• physics -

(a) KE increases by e*(delta V) ,
where delta V = 101 Volts

(b) KE decreases by the same amount as in (a). The electron must possess initial kinetic energy of at least 101*e to reach the -31 V location.

• physics -

this should be in Joules.....

## Similar Questions

1. ### Physics

In a certain cyclotron a proton moves in a circle of radius 0.5m. The magnitude of the magnetic field is 1.2T. a) What is the oscillator frequency?
2. ### Physics

A proton is released from rest in a uniform electric field which is directed along the x axis and of magnitude E=2*10exponent5 V/m.The proton undergoes a displacement from point A at the origin to point B at x=0.2m.What is the change …
3. ### Physics 3

A 2.3-keV proton is moving horizontally and passes perpendicular to the Earth’s magnetic field at a location where the field magnitude is 52.0 T. i) Determine the magnetic force on the proton?
4. ### Physics 3

A 2.3-keV proton is moving horizontally and passes perpendicular to the Earth’s magnetic field at a location where the field magnitude is 52.0 T. i) Determine the magnetic force on the proton?
5. ### Physics

A proton with mass 1.67×10−27 kg and charge 1.60×10−19 C accelerates from rest in a uniform electric field of strength 500 N/C. (a) What is the magnitude of the acceleration of the proton?
6. ### physics

A proton moves parallel to an electric field between points A and B. The change in the proton's electric potential energy is EPEB – EPEA. If the proton is removed from point B and replaced with an electron, how does the change in …
7. ### Physics

A relativistic proton has a momentum of 1.0×10^-17 kg ∙ m/s and a rest energy of 0.15 nJ. What is the kinetic energy of this proton?
8. ### Physics

A relativistic proton has a momentum of 1.0×10^-17 kg ∙ m/s and a rest energy of 0.15 nJ. What is the kinetic energy of this proton?
9. ### physics

A proton is projected at a stationary 6238 Ni aluminum target. The proton momentarily comes to a halt at a distance from the center of an aluminum nucleus, equal to twice the nuclear radius. Assume that the nucleus retains its spherical …
10. ### physics

the mass of a proton is 1836 times the mass of an electron a)a proton is traveling at speed v. at what speed (in terms of v) would an electron have the same kinetic energy as the proton?

More Similar Questions