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-BARSIC- [3]
3 years ago
13

What led astronomers to believe in the existence of dark matter?

Physics
1 answer:
Tju [1.3M]3 years ago
3 0
It’s either C or D. let me know but I would do C!
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a 15 kg tv sots on a shelf at a height of 0.3 m. how much gravitational potential energy is added to the television when it is l
nata0808 [166]
Gravitational potential energy can be described as m*g*h (mass times gravity times height).

Originally,
15kg * 9.8m/s^2 *0.3 m = 44.1 kg*m^2/s^2 = 44.1 Joules.

After it is moved to a 1m shelf:
15kg * 9.8m/s * 1 = 147 kg*m^2/s^2= 147 Joules.

To find how much energy was added, we subtract final energy from initial energy:

147 J - 44.1 J = 102.9 Joules.
6 0
3 years ago
Ice that formed thousands of years ago is often found to contain tiny bubbles of gas. this gas came from __________. ice that fo
motikmotik
Atmosphere

Atmospheric gas from prehistoric eras is found trapped in glaciers in the form of bubbles. These gas bubbles are the basis of studying ice cores as they provide us with accurate estimates of the conditions of past climates. The bubbles allow us to determine the composition of atmospheric air, such as the carbon dioxide and methane concentrations, as well as allow us to determine air temperatures in the past.
8 0
3 years ago
Select the words that make the sentence a true statement.
ZanzabumX [31]

Answer:

1.  force

2. greater

Explanation:

4 0
3 years ago
Read 2 more answers
What does an electric circuit mean?​
nikitadnepr [17]

Answer: An electric circuit includes a device that gives energy to the charged particles constituting the current, such as a battery or a generator; devices that use current, such as lamps, electric motors, or computers; and the connecting wires or transmission lines.

Explanation: Hope this helped! <3

6 0
2 years ago
Meter #1 can measure voltage to within 0.1 volts. Meter #2 can measure voltage to within 0.01 volts.
Ann [662]

Meter #2 is more precise.

There's no information here that tells us which meter is more accurate.

4 0
3 years ago
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