There is no predicate adjective in that sentence because there is no linking verb. The adjectives are "powerful" and "far away".
Telescope
They detect waves coming off of the closest stars
An adjective is a word that describes a noun or a verb. Some example of adjectives that would describe a top professional athlete would be: fast, strong, powerful, determined, agile, quick.
Powerful good at comading helping
about 7 thousand volts or more some can be as powerful as police stun guns
These powerful currents are known localy as "races" or "roosts," according to who you ask.
By using very powerful telescopes to scan the sky.
Scientist use extremely powerful telescopes and machines to measure the brightness of stars. If a planet were to pass in front of the star than the stars brightness may dip by 1/1000th of a percent. The telescopes are so powerful that they are able to measure this dip and thus allow scientist to detect exoplanets.
There is no predicate nominative in that sentence. A predicate nominative follows a linking verb. "has given" is a transitive verb.
powerful
There is no such profession as a lightning volt scientist.
Optical telescopes can't penetrate the clouds of Venus, but data have been collected from the surface and from the atmosphere below the clouds with radar, radio telescopes, and landing spacecraft.
powerful lightning
It depends on the context, but I would say power. Since powerful is an adjective, changing the suffix of -ful would change the part of speech. In this case the only one that makes sense would be power.
The word powerful is an adjective, a word that describes a noun, such as a powerful engine or a powerful argument.The noun form for the adjective powerful is powerfulness, an abstract noun. Another abstract noun form is power.
They detect waves coming off of the closest stars
powerful is your mom
Yes, it is. It means strong or powerful.