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Svetach [21]
3 years ago
6

Which evidence best supports the theory that the universe began with a massive explosion?

Physics
2 answers:
RUDIKE [14]3 years ago
8 0
Evidence isn't used to support theories. Theories are attempts to explain evidence. The so-called "big bang theory" is able to explain the origin of the cosmic background radiation.
Ivanshal [37]3 years ago
5 0
I think it's b. But I'm not sure
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In space (no gravity or friction), you throw a ball with mass 0.1 kg at a target with mass 1 kg. You throw the ball at a speed o
ioda

Answer:

Explanation:

We shall apply law of conservation of  momentum in space to know the velocity of combination after the impact

m₁v₁ = m₂v₂

.1 x 4 = ( 1 + .1 ) v₂

v₂ = .3636 m /s

1  )  

Kinetic energy of the combination

= 1/2 x 1.1 x ( .3636)²

= 7.3 x 10⁻² J

2 )

Initial kinetic energy of the system

= 1/2 x 0.1 x 4²

= 0.8 J

Final  kinetic energy of the system = 7.3 x 10⁻²

Loss of energy = .8 - .073

= .727 J

This energy was converted into internal energy of the system .

3 )

increase in entropy = dQ / T

Here dQ = .727 J

T  = 300 ( Constant )

dQ / T = 2.42 X 10⁻³ J/K

6 0
3 years ago
Distinguish between atoms and molecules,
Lisa [10]
An atom is the smallest particle of an element which can take part in a chemical reaction

A molecule is the smallest particle of a substance that can normally exist alone and still retain the chemical properties of that substance, Be it an element or a compound.

Isotopic mass is the mass of an isotope of an element

Atomic mass is the mass of an atom.The relative atomic mass,A of an element is the number of times the average mass of one atom of that element is heavier than one-twelfth the mass of one atom of carbon-12

Molecular mass is the mass of a given molecule. The relative molecular mass,M, of an element or a compound is the number of times the average mass of one molecule of it is heavier than one-twelfth the mass of one atom of carbon-12

One mole of a substance is the amount containing as many elementary entities as the number of atoms in exactly 12 grams of Carbon-12 .

The molar mass of any substance is the mass of one mole of that substance expressed in grams

Hope I helped
Please mark brainliest
7 0
3 years ago
Insects breathe by using a system called tracheae. where are these tubes located on an insect
diamong [38]
A row of holes in the abdomen
3 0
3 years ago
Read 2 more answers
When a satellite is above earthâs atmosphere, is it also beyond the pull of earthâs gravity? defend your answer.when a satellite
muminat
No. Gravity is proportional to the inverse square of distance, and has no distance limit. A satellite that's, say, 400 miles above Earth's surface feels about 83% of the strength of gravity on the surface.
8 0
3 years ago
List 3 pieces of evidence for the Earth’s spherical shape
KATRIN_1 [288]

Answer:

1.time zones

2.The coriolis effect

3. triangles

Explanation:

1. day and night happen at different times at different places; it's always day somewhere and night another.

2. the coriolis effect means freely moving things (like cannonballs or hurricane  winds) are deflected to the right - but only if your north of the equator if you're  south of the equator they're deflected left.

3. if you walk a certain distance and make three right angle you can successfully make a triangles with three 90 degree angles which is impossible on a flat surface.

3 0
3 years ago
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