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Katen [24]
4 years ago
7

Why is so much energy required and released in a nuclear reaction?

Physics
1 answer:
aalyn [17]4 years ago
6 0
Because of nuclear fusion , the sun combines gas that makes other gases and releases energy
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A crash test dummy is inside a test car moving at 55 km/h. How fast is the dummy moving relative to the seat he is sitting in?
kvasek [131]

The dummy is moving with a speed 0 km/h relative to the seat in which it is sitting.

If the relative speed was non-zero, the dummy would move away from its seat, which contradicts the problem formulation.

7 0
3 years ago
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Isaac newton discovered that the color white is created when light passes through a prism. t or f?
kap26 [50]

Answer:

false

Explanation:

discovered colours of the rainbow

7 0
3 years ago
Which characteristic gives the most information about what kind of element an atom is ?
Butoxors [25]

Answer:

The atomic number

Explanation:

7 0
4 years ago
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An ostrich can run at a speed of 43 mi/hr. How much ground can an ostrich cover if it runs at this speed for 15 minutes? (Hint:
Simora [160]
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4 0
4 years ago
A person hears a siren as a fire truck approaches and passes by. The frequency varies from 480Hz on approach to 400Hz going away
alekssr [168]

Answer:

31.2 m/s

Explanation:

f_{app} = Frequency of approach = 480 Hz

f_{aw} = Frequency of going away = 400 Hz

V = Speed of sound in air = 343 m/s

v = Speed of truck

Frequency of approach is given as

f_{app} = \frac{Vf}{V - v}                           eq-1

Frequency of moving awayy is given as

f_{aw} = \frac{Vf}{V + v}                          eq-2

Dividing eq-1 by eq-2

\frac{f_{app}}{f_{aw}} = \frac{V + v}{V - v}

\frac{480}{400} = \frac{343 + v}{343 - v}

v = 31.2 m/s

7 0
3 years ago
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