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Gnom [1K]
3 years ago
12

Pria's radio produces 80 useful energy units for every 100 units of electricity used. The efficiency of the radio is _____.

Biology
2 answers:
a_sh-v [17]3 years ago
8 0
80%

hope this helps.
my sister is called pria too lol :)
MissTica3 years ago
4 0

Answer:

80%

Explanation:

Energy efficiency is linked to an element's ability to create energy in relation to the level of energy consumption. Typically, systems with this feature can keep up and consume fewer resources. In the case reported in the question, Pria's radio produces 80 units of useful energy for every 100 units of electricity used, so to know in percentage what is the efficiency of Pria's radio, we only need to multiply the 80 units of useful energy of Pria's radio, by 100% and divide the result by the 100 units of electricity used. This calculation is made as follows:

  • 80 x 100 = 8000
  • 8000/100 = 80%
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2. 294N

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The weight of an object is the force that gravity is having over it, and we measure it in <u>Neutowns (N), which equals Kg x m/s².</u>

To find the weight of an object, we use the formula F= m x g.

F stands for force, m for the object's mass, and g for gravity, which is the force that attracts objects to Earth, and we measure it by the acceleration that an object has during free falling.

<u>The Earth's gravity is 9.8 m/s²</u>

1. We use the formula F=m x g

F= 30kg x 9.8 m/s²

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2. We have to convert the 30000g into kg to use the formula

30000÷1000= 30kg

30000g equals to 30Kg, so the object's mass (m) is 30Kg.

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F= 2kg X 9.8 m/s²

F= 19.6 N

4.We have to convert the 2000g into Kg.

2000÷1000= 2Kg

The object's mass (m) is 2Kg.

F= m X g

F= 2kg X 9.8 m/s²

F= 19.6 N

5. F= m X g

F= 0.5 kg X 9.8 m/s²

F= 4.9 N

6.We have to convert 500g to Kg.

500g÷1000=0.5Kg

The object's mass (m) is 0.5 kg

F= m X g

F= 0.5 Kg X 9.8 m/s²

F= 4.9 N

7. The gravity on the moon is different from the one on Earth. In the formula, instead of 9.8 m/s² for the gravity (g), we use 1.6 m/s².

F= m X g

F= 50Kg X 1.6m/s²

F= 80N

8. The gravity (g) on Mars is 3.7 m/s², so we have to use it in the formula where it says g to find the object's weight on Mars

F= 50Kg X 3.7m/s²

F= 185 N

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