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Nady [450]
3 years ago
15

Physical science help

Physics
2 answers:
mojhsa [17]3 years ago
4 0
The answer is pulley
VMariaS [17]3 years ago
3 0

The flagpole used a PULLEY at the top.

The cutting edge of the axe is a WEDGE.

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What do miles, kilometers, and light-years have in common?<br><br>​
Radda [10]

They are all units of measure of length

Explanation:

Length is a scalar quantity representing a distance between two points, and it can be expressed in different units.

The SI units of the length is the metre (m), which is defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.

A unit which is common used is a multiple of the meter, the kilometre (km) which corresponds to 1000 metres:

1 km = 1000 m

Another unit used in the UK system is the mile (mi), where the conversion factor between miles and metres is

1 mi = 1609.34 m

Finally, these units are not suitable to be used to measure astronomical distances - such as those between stars and galaxies. For this, another unit is used, which is the light-year (ly), which corresponds to the distance travelled by the light in a vacuum in one year, and its conversion factor to the metre is:

1 ly = 9.46\cdot 10^{15}ly

Learn more about distance here:

brainly.com/question/3969582

#LearnwithBrainly

6 0
3 years ago
What is the kinetic energy of a bike with a mass of 16 kg traveling at 4m/s
sergey [27]

Explanation:

answer is that i think???

7 0
3 years ago
Nets used to catch falling boulders on the side of rocky hillside roadways
Natalija [7]

Answer:

more time to change the momentum of falling rocks

Explanation:

Momentum is related to "mass in motion." So, if an object is moving, then it has momentum as it has its mass in motion. The amount of momentum is dependent upon how much and how fast the object is moving.

If an object is moving slowly, it means that the object is losing momentum.

Nets used to catch falling boulders on the side of rocky hillside roadways  are more effective than rigid fences because their breakage is reduced by more time to change the momentum of falling rocks.

3 0
4 years ago
A heat engine uses thermal energy that flows from a heat source with a temperature of 325 K to a cold sink, which has a temperat
Ilya [14]
The answer is "58.5"
5 0
3 years ago
Read 2 more answers
Encontrar el peso de un elefante cuya masa es de 4500kg. Recordar que la gravedad es de 9.8m/s2
dusya [7]

la respuesta es 459.183673 kg s2 / m

7 0
3 years ago
Read 2 more answers
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