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3 years ago

Which represents the most accepted form of scientififc ideas

Physics

1 answer:

andrezito [222]3 years ago

6 0

Explanation:

A paradigm can be defined as universally recognized scientific patterns theories or achievements that , for a time that provides a model for problems and solution for a community of practitioners. that is most accepted from of scientific ideas

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Three rocks with masses of 1 kg, 5 kg, and 10 kg fall from the same height.

Naily [24]

Answer:
The 10 kg rock has more inertia than the other two rocks.

Explanation

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3 years ago

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Please help

cupoosta [38]

I definitely agree with choise that you consider to be as a correct one. I am pretty sure that prganism is correct because this is a unit which ebrases all the mentioned points. And in simple words, the rest of options represent collective objects but you have to answer with sole one. Hope you find it helpful.

8 0

4 years ago

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A 13500 kg jet airplane is flying through some high winds. At some point in time, the airplane is pointing due north, while the

Mekhanik [1.2K]

Answer

given,

mass of the jet airplane = 13500 kg

Force on the plane = 35700 N due north

force from wind = 15300 N in direction 80.0° south of west.

Force = $35700 \vec{j} N$

force by wind = $15300(-cos \theta \vec{i}-sin \theta \vec{j})$ N

= $15300(-cos 80^0 \vec{i}-sin 80^0 \vec{j})$ N

net force on the jet airplane(ma)

$m a = 35700 \vec{j} + 15300(-cos 80^0 \vec{i}-sin 80^0 \vec{j})$

$\vec{a} = \dfrac{35700}{13500} \vec{j} + \dfrac{15300}{13500}(-cos 80^0 \vec{i}-sin 80^0 \vec{j})$

$\vec{a} = 2.64\vec{j} -0.197 \vec{i} - 1.116 sin 80^0 \vec{j})$

$\vec{a} = -0.197 \vec{i} + 1.524 \vec{j}$

$a = \sqrt{-0.197^2+1.524^2}$

a = 1.54 m/s²

$\theta = tan^{-1}(\dfrac{-1.524}{0.197})$

$\theta = -82.63^0$

3 0

3 years ago

Astronomers observe a quasar and measure its spectrum. A particular spectral line has a value of 279.8 nm when measured using a

Arada [10]

Answer:

$v=-80.5*10^{6}m/s$

Explanation:

For this particular problem, we are going to use the non-relativistic Doppler effect which, is the change in frequency of a wave concerning an observer who's moving relative to the wave source. The shifted wavelength is:

$\lambda_{shifted}=\lambda_{0}\left(1+\dfrac{v}{c_{0}}\right)$ ,

where $\lambda_{0}$ is the wavelenght as it comes from the source, $v$ is the velocity of the source (the quasar) and, $c_{0}$ is the velocity of the wave. In this case, the velocity of the wave is the speed of light, $c_{0}=c=3*10^{8}\ m/s$ .

Solving for $v$ ,

$v=c\left(\dfrac{\lambda_{shifted}}{\lambda_{0}}-1\right)$ ,

now computing

$v=3*10^{8}\left(\dfrac{279.8*10^{-9}}{382.5*10^{-9}}-1\right)$ ,

$v=-80.5*10^{6}m/s$

The velocity of the quasar is negative because it is getting close to the Earth!

8 0

3 years ago

I throw a ball off the edge of a 15.0m cliff. If I threw it horizontally at 8.0 m/s, how much time did it take to fall?

pickupchik [31]

Just ignore the horizontal component

if you have a vertical displacement of 15m, 0ms^1 initial velocity, end velocity is ignored, we know the acceleration due to gravity as 9.81ms^2 so we can work out the time using SUVAT

S=15
U=0
V=?
A=9.81
T=?

S=UT + 0.5 AT^2

UT=0

therefore,

S=0.5AT^2

rearrange to:

T=SQR (2S/A)

T = 1.75 seconds

3 0

4 years ago