Addition by 1. Components: Three vectors, , , and , have the components shown in the table. What angle does the resultant of these three vectors make with the +x-axis??x componenty component?-3.5 m4.5 m?0.00 m-6.5 m

src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q38g6.jpg" style="vertical-align: -5.0px;" />?5.5 m-2.5 m

A. 24° above the +x-axis
B. 24° below the +x-axis
C. 66° above the +x-axis
D. 66° below the +x-axis

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Answer: D

Physics & Space Science

Olbers's paradox is based on the assumption that the Universe began at some time in the past

Indicate whether the statement is true or false

What will most likely be the long-term future of the MWG?

(More than one answer possible.)

A.In a few trillion years, all the stars, gas, and dust of the MWG will be consumed by the supermassive black hole at the galaxy's core. This will be a bad day.

B.As time goes by there will be greater and greater enrichment of the heavier elements. Stars that form from the enriched ISM will have higher levels of metallicity.

C.In a few billion years, the MWG and Andromeda galaxy (M31) will merge. During the merger, great tidal streams of stars will be drawn out of both galaxies. Ultimately, the two spiral galaxies will blend into a single galaxy.

Which of the following is not a heat engine?

A) steam locomotive B) hydro-electric generating plant C) nuclear electric power plant D) coal-fired electric generating plant E) automobile engine

At what rate is power supplied by the 10-V emf shown below?

a.
?10 W

b.
+10 W

c.
zero

d.
+20 W

e.
?20 W