What is the correct ordering of galactic components using the new bottom-up hypothesis starting from oldest to youngest?
a. galactic halo, average globular clusters, galactic disk
b. galactic halo, galactic disk, average globular clusters
c. average globular clusters, galactic halo, galactic disk
d. average globular clusters, galactic disk, galactic halo
e. galactic disk, average globular clusters, galactic halo.
a
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A body travels at an initial speed of 2.5 m/s. Given a constant acceleration of 0.2 m/s2, what is the speed of the body at time 25 seconds later?
A. 7.5 m/s. B. 3.4 m/s. C. 3.6 m/s. D. 5.5 m/s. E. 6.0 m/s.
By using a compass to measure the magnetic field direction at various points adjacent to a long straight wire, you can show that the wire's magnetic field lines are
a. straight lines in space that go from one magnetic charge to another. b. straight lines in space that are parallel to the wire. c. straight lines in space that are perpendicular to the wire. d. circles that have their centers on the wire and lie in planes perpendicular to the wire. e. circles that have the wire lying along a diameter of the circle.
A proton moving eastward with a velocity of 5.0 × 103 m/s enters a magnetic field of 0.20 T pointing northward. What is the magnitude and direction of the force that acts on the proton?
A) 0 N B) 1.6 × 10-16 N upwards C) 1.6 × 10-16 N downwards D) 1.1 × 10-16 N eastwards E) 4.4 × 10-16 N westwards
Jupiter, Saturn, Uranus and Neptune are only located at a distance of 1 AU or less from the Sun
a. True b. False Indicate whether the statement is true or false