A tiny particle with charge + 5.0 ?C is initially moving at 55 m/s. It is then accelerated through a potential difference of 500 V. How much kinetic energy does this particle gain during the period of acceleration?
A) 1.0 × 104 J
B) 2.5 × 10-3 J
C) 100 J
D) 2500 J
B
Physics & Space Science
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An electron gun sends electrons through a region with an electric field of 
for a distance of 2.5 cm. If the electrons start from rest, how fast are they moving after traversing the gun?
a. 
b. 
c. 
d. 
e. 
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Who proposed the cylindrical model of earth?
What will be an ideal response?
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In the production of sediment from fresh rock, which usually occurs first, erosion or weathering?
What will be an ideal response?
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For a particle in a 1-dimensional box, what happens to the zero-point energy if the width of the box is halved?
A. nothing, it remains at zero B. it doubles C. it halves D. it quadruples E. it quarters
Physics & Space Science