What are gravitational waves? Have they ever been detected?
What will be an ideal response?
Gravitational waves are ripples of spacetime caused by the motion of massive objects (the more massive the object, the greater the ripples). They travel at the speed of light but are so weak that they have not yet been detected. New "telescopes" are being built, however, to search for them. The effect of gravitational waves has been seen in the orbital decay of a very close binary neutron star system: the gravitational waves carry energy away from the binary and the two neutron stars move closer and closer together, speeding up their orbits measurably. Based on estimates of the number of binary neutron star systems, scientists expect to detect 10 or more events per year with Advanced LIGO.
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Differences among AGNs as viewed from different inclination angles is known as a ________________
Fill in the blank(s) with correct word
Two identical arrows, one with twice the kinetic energy of the other, are fired into a bale of hay. Compared with penetration of the slow arrow, the faster arrow penetrates
A) the same distance. B) twice as far. C) four times as far. D) more than four times as far. E) none of the above
If a foreign atom is more than _____________% larger than its host, it normally does not form a continuous substitutional solid solution.
Fill in the blank(s) with the appropriate word(s).
How might one connect four 10. volt batteries to create one equivalent battery having a potential of 20. volts?
What will be an ideal response?