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3 years ago

As scientists learn more what happens to scientific ideas?

Physics

2 answers:

blsea [12.9K]3 years ago

4 0

They could change but most likely not

skelet666 [1.2K]3 years ago

3 0

As scientist learn more they will develop or reconstruct their scientific ideas, most scientific ideas follows the scientific method, which includes coming up with predictions, revising old theories with the light of new theories or observations, and trying to falsify a theory or any scientific ideas, as time goes on.

Usually starting from scientific ideas, it goes on to coming up with hypothesis, then executing research, combining ideas from past published or unpublished research data and ideas, and eventually publish on a scientific journal, and other scientist will put in their two cents to the theory/scientific idea published.

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Calculate the minimum average power output necessary for a person to run up a 12.0 m long hillside, which is inclined at 25.0° a

Viktor [21]

Answer:

Power, P = 924.15 watts

Explanation:

Given that,

Length of the ramp, l = 12 m

Mass of the person, m = 55.8 kg

Angle between the inclined plane and the horizontal, $\theta=25^{\circ}$

Time, t = 3 s

Let h is the height of the hill from the horizontal,

$h=l\ sin\theta$

$h=12\times \ sin(25)$

h = 5.07 m

Let P is the power output necessary for a person to run up long hill side as :

$P=\dfrac{E}{t}$

$P=\dfrac{mgh}{t}$

$P=\dfrac{55.8\times 9.8\times 5.07}{3}$

P = 924.15 watts

So, the minimum average power output necessary for a person to run up is 924.15 watts. Hence, this is the required solution.

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3 years ago

The magnetic field lines of a bar magnet spread out from the

padilas [110]

Answer:

A: North end to the south end

Explanation:

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3 years ago

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Four identical metallic objects carry the following charges 1.82 6.65 4.80 and 9.30 C The objects are brought simultaneously int

GuDViN [60]

Answer:

a) 5.64 C

b) 3.5*10¹⁹ protons

Explanation:

Since the four metallic objects are identical, and total charge must be conserved, this means that after brought simultaneously into contact so that each touches the others, once separated, total charge must be the same than before being brought in contact.
But due they are identical, after charges were able to transfer freely between them, the four objects must have the same final charge, i.e. the fourth part of the total charge, as follows:

$Q_{n} = \frac{Q_{tot}}{4} = \frac{22.57C}{4} = 5.64 C (1)$

This charge will be divided between n protons, since the charge is positive.
Since each proton carries a charge equal to the elementary charge e, which value is 1.6*10⁻¹⁹ C, we can find the number of protons in excess, doing the following calculation:
$n_{p} =\frac{Q_{n}}{e} = \frac{5.64C}{1.6e-19C} = 3.5 e19 C (2)$

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3 years ago

At a objects highest point is the acceleration zero too?

puteri [66]

Answer:

Acceleration from gravity is always constant and downward, but the direction and magnitude of velocity change. At the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth

Explanation:

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4 years ago

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An insulator:

fomenos

<span>An insulator resists conduction of electrons.</span>

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4 years ago