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professor190 [17]
4 years ago
6

The chemical formula for two substances are Fe and Fe2O3 which is an element and which is a compound how would you justify the s

election of substances as an element or as a compound
Physics
1 answer:
ipn [44]4 years ago
8 0

Answer:

Fe - Element

Fe2O3 - Compound

Explanation:

From the given chemical formula for two substances, Fe and Fe2O3, Fe is an element while fe2O3 is a compound.

It is so because an element is consist of the same type of atoms while a compund is consist of different atoms under specific proportions. for example: Fe is an element while fe2O3 is a compound.

Hence, the correct answer is:

Fe - Element

Fe2O3 - Compound

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A car is moving from rest and attained a velocity of 80 m/s. Calculate the acceleration of the car after 5 s?
soldi70 [24.7K]

Answer:

400 m/s

Explanation:

If it is moving at a velocity of 80 m/s from rest, then after 5 s it would be at 400 m/s.

80 x 5 = 400

7 0
3 years ago
0.8 mj of energy are used by a blender in 3 and a half minutes what is the power rating on the blender
solong [7]

Answer:

   Power rating on the blender = 3809.52 Watts

Explanation:

   We have expression for power equal to ratio of work and time,

   Energy used by blender = Work done by electricity = 0.8 MJ = 0.8*10^6J=800000J

   Time of using blender = 3.5 minutes = 210 seconds

   So power of blender = 800000/210 = 3809.52 Watts

   Power rating on the blender = 3809.52 Watts

5 0
4 years ago
A&amp;P I need helppp <br> plspls
katrin2010 [14]

Answer:

c

Explanation:

6 0
3 years ago
Convection is a means of heat transfer that involves fluids, such as liquids or gasses. The process of convection is responsible
Grace [21]

Answer:

Correct answer is B.

Explanation:

6 0
3 years ago
Read 2 more answers
Suppose that diameters of a new species of apple have a bell-shaped distribution with a mean of 7.2cm and a standard deviation o
Svet_ta [14]

Answer:

97.5%

Explanation:

By the empirical rule (68-95-99.7),

  1. 68% of data are within <em>μ </em>- <em>σ</em> and <em>μ </em>+ <em>σ</em>
  2. 95% of data are within <em>μ </em>- 2<em>σ</em> and <em>μ </em>+ 2<em>σ</em>
  3. 99.7% of data are within <em>μ </em>- 3<em>σ</em> and <em>μ </em>+ 2<em>σ</em>

<em>σ </em> and <em>μ</em> are the standard deviation and the mean respectively.

From the question,

<em>μ</em> = 7.2 cm

<em>σ</em> = 0.38 cm

7.96 = 7.2 + (<em>n</em> × 0.38)

<em>n</em> = 2

Hence, 7.96 represents <em>μ </em>+ 2<em>σ</em>.

P(X < <em>μ </em>+ 2<em>σ</em>) = P(X < <em>μ</em>) + P(<em>μ</em> < X < <em>μ </em>+ 2<em>σ</em>)

P(X < <em>μ</em>) is the percentage less than the mean = 50%.

P(<em>μ</em> < X < <em>μ </em>+ 2<em>σ</em>) is half of P(<em>μ </em>- 2<em>σ</em> < X < <em>μ </em>+ 2<em>σ</em>) = 95% ÷ 2 = 47.5%.

Considering this, for apples that are no more than 7.96 cm,

P(X < 7.96) = P(X < 7.2) + P(7.2 < X < 7.96) = 50% + 47.5% = 97.5%

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5 0
3 years ago
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