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lozanna [386]
4 years ago
5

Witch of the statements is true about scientific theories?

Physics
1 answer:
PolarNik [594]4 years ago
3 0

Any number of statements may be true concerning scientific theories. The important thing to keep in mind when discussing a scientific theory, whether it is the theory of evolution or the theory of relativity, is that theory is not synonymous with hypothesis.

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What is ft, the magnitude of the tangential force that acts on the pole due to the tension in the rope?
Arisa [49]
The magnitude of the tangential force that acts on the pole due to the tension in rope is given as

T= weight x tan (theta) /2


8 0
4 years ago
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A car, initially traveling at 81.8 mi/h, slows to rest in 7.1 s. What is the car's acceleration?
maksim [4K]

Answer:

a = -16.9 ft/s²

Explanation:

81.8 mi/hr(5280 ft/mi / 3600s/hr) = 120 ft/s

a = Δv/t = (0 - 120) / 7.1 = -16.9 ft/s²

if the initial direction is taken as the positive direction.

5 0
3 years ago
Explain the difference between radiation as it is used in most everyday language and radiation as it is used in an astronomical
horsena [70]

Answer:Explained Below

Explanation:

Radiation in everyday language refers  to certain type of subatomic particle released by a radioactive unstable nucleus.It can be used to kill the cancer by damaging the DNA of cancer cells.

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3 years ago
A 0.5 kg block slides down a frictionless semicircular track from a height, h, and collides with a second 1.5 kg block at the bo
Ede4ka [16]

Answer:

h' = 0.062\cdot h

Explanation:

The speed of the 0.5 kg block just before the collision is found by the Principle of Energy Conservation:

U_{g} = K

m\cdot g \cdot h = \frac{1}{2}\cdot m \cdot v^{2}

v = \sqrt{2\cdot g \cdot h}

v = \sqrt{2\cdot (9.807\,\frac{m}{s^{2}} )\cdot h}

v \approx 4.429\cdot \sqrt{h}

Knowing that collision is inelastic, the speed just after the collision is determined with the help of the Principle of Momentum Conservation:

(0.5\,kg) \cdot (4.429\cdot \sqrt{h}) = (2\,kg)\cdot v

v = 1.107\cdot \sqrt{h}

Lastly, the height reached by the two blocks is:

K = U_{g}

\frac{1}{2}\cdot m \cdot v^{2} = m\cdot g \cdot h'

h' = \frac{v^{2}}{2\cdot g}

h' = \frac{(1.107\cdot \sqrt{h})^{2}}{2\cdot \left(9.807\,\frac{m}{s^{2}} \right)}

h' = 0.062\cdot h

3 0
3 years ago
How are scientists studying the effects of space on the human body?
Vsevolod [243]

Answer:

The human body affects vision and bone density in space.

Explanation:

6 0
3 years ago
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