Gravity obeys the inverse square law, which implies that the gravitational force of one body on another will be ____ times stronger at two meters than at six meters apart
a. 2
b. 3
c. 4
d. 9
e. 10
d
Physics & Space Science
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Which kind of telescope is shown?
a. infrared b. radio c. optical d. ultraviolet
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A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.60 N, what is the current in the wire?
A) 1.0 A B) 5.0 A C) 2.0 A D) 3.0 A E) 4.0 A
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The upper chromosphere is hot enough to emit X-rays
a. True b. False Indicate whether the statement is true or false
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A set of charged spheres carries -1.5 mC and each has mass 15 ?g. What vertical electric field in the laboratory would cause these spheres to continue in a straight line if they were projected horizontally into the electric-field region?
A. -98 ?V/m B. 10 mV/m C. -10 mV/m D. 98 ?V/m
Physics & Space Science