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Nikolay [14]
2 years ago
12

What is the difference is a hypothesis and a theory

Physics
1 answer:
Tresset [83]2 years ago
5 0
A hypothesis is an educated guess, while a theory is usually a tested, well substained explanation of something.
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I need the answer ASAP. Please explain your answer too. 20 points!
Oksana_A [137]

Answer; g

Explanation: the human is a lot smaller than the train

7 0
2 years ago
What is the transfer of heat by the flow of a heated material?
dolphi86 [110]
Heat<span> flux is a quantitative, vectorial representation of </span>heat-flow<span> through a surface. ...</span>Heat transfer<span> is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and </span>transfer<span> of energy by phase changes.</span>
7 0
3 years ago
Patrick is repairing the roof on his house. He uses a hammer having a mass of 1 kilogram. While working at the apex of the roof,
pav-90 [236]

Answer:

72 joules

Explanation:

The potential energy of that hammer is a function of its displacement against gravity. Considering that it fell with a velocity of 12 m/s, it was its displacement against gravity that gave it this velocity. It will continue to move until its displacement to gravity is zero.

since the body is in motion; it has converted its potential energy (mgh, m is mass, g is acceleration due to gravity, and h is the height) to kinetic energy (energy due to motion, 1/2mv^2; m = mass, v = velocity or speed)

therefore the potential energy is equal to kinetic energy

mgh = 1/2mv^2 = 1/2 *1kg* 12*12 = 72 joules.

5 0
3 years ago
Water flows over a section of Niagara Falls at rate of 1.1×10^6 kg/s and falls 49.4 m. How much power is generated by the fallin
DerKrebs [107]

Answer:

<em>The power generated is =  5.33×10⁸ Watt. </em>

Explanation:

Power: Power can be defined as the time rate of doing work. The S.I unit of power is <em>Watt(W).</em>

<em>Mathematically,</em>

<em>Power (P) = Work done/time or Energy/time</em>

P = mgh/t............................... Equation 1

P = δgh............................. Equation 2

Where δ = fall rate, g = acceleration due to gravity, h = height.

<em>Given: </em>δ = 1.1×10⁶ kg/s, h = 49.4 m g = 9.81 m/s²

Substituting these values into equation 2

P = 1.1×10⁶×49.4×9.81

P = 533.08×10⁶

<em>P = 5.33×10⁸ Watt.</em>

<em>Thus the power generated is =  5.33×10⁸ Watt. </em>

5 0
3 years ago
Why is the nitrogen cycle considered a closed system?
Svetradugi [14.3K]

B nitrogen stays in order so it can't change movement

8 0
3 years ago
Read 2 more answers
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