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allochka39001 [22]
4 years ago
13

Andre, whose mass is 77.1 kg, sits on a diving board above a dunk tank. If he is sitting 0.90 m above the water, what is his tot

al mechanical energy?
Physics
2 answers:
Ganezh [65]4 years ago
8 0

Answer:

680 J

Explanation:

Mechanical energy = potential energy + kinetic energy

ME = PE + KE

ME = mgh + ½ mv²

ME = (77.1 kg) (9.8 m/s²) (0.90 m) + ½ (77.1 kg) (0 m/s)²

ME = 680 J

konstantin123 [22]4 years ago
3 0

Answer:

680 is correct

Explanation:

edge 2020

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This is a uniform rectilinear motion (MRU) exercise.

To start solving this exercise, we obtain the following data:

<h3><u>DATA:</u></h3>
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We apply the following formula: d = v * t

We clear our data in the formula:

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\bf{d=57 \ m}

The baseball in 15 seconds will roll a distance of 57 meters.

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How can you tell if one object has more mass than another does, on a planet without gravity
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In a mass spectrometer, a compound is first vaporized and converted into ions, which are then separated based on a difference in
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The correct answer is  their difference in the charge to  mass ratio  a mass spectrometer, a compound is first vaporized and converted into ions .

Mass spectrometry is a technique for determining the mass-to-charge ratio (m/z) of one or more molecules in a sample. These measurements are frequently used to calculate the precise molecular weight of the sample components.

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How do elements change as you move down a column in a periodic table? a.the atomic radius decreases b.the number of protons decr
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4 0
4 years ago
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a 905 - g meteor impacts the earth at a speed of 1623 m/s. if all of its energy is entirely converted to heat in the meteor, wha
nlexa [21]

Answer: 2859.78 k

Explanation: By using the law of conservation of energy, the kinetic energy of the meteor equals the heat energy.

Kinetic energy = 1/2mv^2

Heat energy = mcΔθ

Where m = mass of meteor , v = velocity of meteor = 1623 m/s

c = specific heat capacity of meteor (iron) = 460.548 j/kg/k

Δθ = change in temperature of meteor = ?

From law ofconservation of energy, we have that

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By cancelling "m" on both sides, we have that

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(1623)^2 = 2× 460.548 × Δθ

2634129 = 921.096 × Δθ

Δθ = 2634129 / 921.096

Δθ = 2859.78 k

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3 years ago
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