What is the magnitude of the electric field 30.0 cm from a point charge of 0.35 ?C?
a. 
b. 
c. 
d. 
e. 
d.
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Free Fall: Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. Neglect air resistance. As time progresses, the difference in their speeds
A. increases. B. remains constant. C. decreases. D. cannot be determined from the information given.
The fast rotation of neutron stars is a consequence of ________.
A. Wien's law B. their high temperature C. the doppler effect D. the law of conservation of angular momentum
Why might inflation have occurred at the end of the GUT era?
A) Gravity was an extremely weak force at this period in time. B) Large amounts of matter and antimatter annihilated at this time. C) There wasn't enough matter present to slow down the expansion at that time. D) The universe was too small and needed to grow quickly. E) An enormous amount of energy was released when the strong force froze out from the GUT force.
Jane plans to fly from Binghampton, New York, to Springfield, Massachusetts, about 280 km due east of Binghampton. She heads due east at 280 km/h for one hour but finds herself at Keene, which is 294 km from Binghampton in a direction 17.8 degrees north of due east. What was the wind velocity?
A. 14 km/h, E B. 14 km/h, W C. 14 km/h, N D. 90 km/h, S E. 90 km/h, N