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Katena32 [7]
3 years ago
11

Help pleaseeee my brainnn stopped working once again lol

Physics
2 answers:
Andrew [12]3 years ago
6 0

Answer:

1c 2a 3b  

Explanation:

julia-pushkina [17]3 years ago
3 0
1c 2a 3b for the answers ———
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If anyone has course hero could you send me the Gizmo Fan Cart Physics?
azamat

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I might be able to help, but I also might not. I need to check if I can get you the answer.

Explanation:

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When you add heat to wood it burns. The cellulose that makes up wood is converted to carbon dioxide, water vapor, and ash. This
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Burning is a chemical change, and this changed the chemical properties of the wood. Indicators that  chemical change has taken place are fizzing, energy being given off or color changes.
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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 ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.19s lat
victus00 [196]

Answer / Explanation

It is worthy to note that the question is incomplete. There is a part of the question that gave us the vale of V₀.

So for proper understanding, the two parts of the question will be highlighted.

A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.19s later. You may ignore air resistance.

a) What must the height of the building be for both balls to reach the ground at the same time if (i) V₀ is 6.0 m/s and (ii) V₀ is 9.5 m/s?

b) If Vo is greater than some value Vmax, a value of h does not exist that allows both balls to hit the ground at the same time.  

Solve for Vmax

Step Process

a)  Where h = 1/2g [ (1/2g - V₀)² ] / [(g - V₀)²]

Where V₀ = 6m/s,

We have,

           h = 4.9 [ ( 4.9 - 6)²] / [( 9.8 - 6)²]

                 = 0.411 m

Where V₀ = 9.5m/s

We have,

     h = 4.9 [ ( 4.9 - 9.5)²] / [( 9.8 - 9.5)²]

                 = 1152 m

b)  From the expression above, we got to realise that h is a function of V₀, therefore, the denominator can not be zero.

Consequentially, as V₀ approaches 9.8m/s, h approaches infinity.

Therefore Vₙ = V₀max = 9.8 m/s

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Which change would result in a stronger electromagnet?
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