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photoshop1234 [79]
2 years ago
8

The main light gathering device of a refractor telescope is

Physics
1 answer:
Nataly [62]2 years ago
3 0

It's the "objective" lens ... the big one in the front.

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Two large aluminum plates are separated by a distance of 2.0 cm and are held at a potential difference of 170 V. An electron ent
notsponge [240]

Answer:

Explanation:

Electric field between plates

V / d

= 170 / ( 2 x 10⁻² )

= 8500 N/C

Force on electron in this field

= 8500 x 1.6 x 10⁻¹⁹

= 13600 x 10⁻¹⁹ N

Acceleration

= 13600 x 10⁻¹⁹ / 9.1 x 10⁻³¹

a = 1494.5 x 10¹² m /s²

s = .1 x 10⁻² m

v² = u² + 2as

=  (2.9x 10⁵)²+ 2 x 1494.5 x 10¹² x .1 x 10⁻²

= 8.41 x 10¹⁰ + 299 x 10¹⁰

= (8.41 + 299 ) x 10¹⁰

v = 17.53  x 10⁵ m /s

8 0
3 years ago
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Olin [163]
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Using an elastic cord, the astronaut in the black shirt pulls the astronaut with the red shirt back towards him before releasing
pishuonlain [190]

Answer:

50 T-shirt Design Ideas That Won't Wear Out - 99Designshttps://99designs.com › blog › creative-inspiration › t-s...

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Explanation:

8 0
2 years ago
Which of the following is NOT a characteristic of a state?
Free_Kalibri [48]
There are four characteristics of a state. population,government,sovereignty,and territory. 
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A hypothesis can be accepted as true after ??? repeated trials. *ill give you 10 points
elena55 [62]

Answer:

true

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I'm assuming this is a true or false question. if u get the same results after each repeated trial that is the only time a hypothesis can be used to support evidence

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