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nikdorinn [45]
3 years ago
14

The Number above the elements symobls is the elements atomic number .

Physics
1 answer:
Anna11 [10]3 years ago
4 0

Answer:

correct

Explanation:

the atomic number is located top left of the atomic symbol given

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2 years ago
• How much work is<br>required to lift a 2kg<br>object 2m high?<br>​
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Answer You need to consider that the gravity on earth is 9.8 m/s/s. This means any object you let go on the earths surface will gain 9.8 m/s of speed every second. You need to apply a force on the object in the opposite direction to avoid this acceleration. If you are pushing something up at a constant speed, you are just resisting earths acceleration. The more massive and object is, the greater force is needed to accelerate it. The equation is Force = mass*acceleration. So for a 2kg object in a 9.8 m/s/s gravity you need 2kg*9.8m/s/s = 19.6 Newtons to counteract gravity. Work or energy = force * distance. So to push with 19.6 N over a distance of 2 meters = 19.6 N*2 m = 39.2 Joules of energy. There is an equation that puts together those two equations I just used and it is E = mgh

The amount of Energy to lift an object is (mass) * (acceleration due to gravity) * (height)

:Hence, the Work done to life the mass of 2 kg to a height of 10 m is 196 J. Hope it helps❤️❤️❤️

Explanation:

7 0
3 years ago
How can I shorten this and for it to sill make sense?
Julli [10]

Answer:

Radiation is the emission or transmission of energy in the form of waves.

Explanation:

.

8 0
3 years ago
Read 2 more answers
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