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cricket20 [7]
4 years ago
13

Two bran muffins are sitting on a table at room temperature.

Physics
1 answer:
velikii [3]4 years ago
4 0
The statement that is true is a. the large bran muffin contains more heat energy. This statement holds true because of the equation E=mc2. E= Energy, m=mass and c=the speed of light. Although both muffins are at room temperature, the larger will theoretically have more heat energy because it has more mass. 
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A cell phone weighing 80 grams is flying through the air at 15 m/s what is the kinetic energy
hjlf

Answer:

9\:\mathrm{J}

Explanation:

Kinetic energy is given by the following equation:

KE=\frac{1}{2}mv^2, where m is mass in \mathrm{kg} and v is velocity in \mathrm{m/s}.

Since the cell phone's mass is given in grams, we need to convert this into kilograms:

80\:\mathrm{g}\cdot \frac{1\:\mathrm{kg}}{1000\:\mathrm{g}}=0.08\:\mathrm{kg}.

Therefore, the kinetic energy of the cell phone is:

KE=\frac{1}{2}\cdot 0.08\cdot 15^2=\fbox{$9\:\mathrm{J}$}.

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3 years ago
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The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces

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I have explained in the image attached below.

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