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8090 [49]
2 years ago
13

As Jules pushes a box across a the floor that it moves faster on the waxed tiles than the carpet. Explain why. A) The more frict

ion experienced means less movement. B) Gravity and friction are different based on conditions C) The box is too heavy to be moved without a using a trolley. D) Jules is not exerting enough push-pull force to move th
Physics
2 answers:
Elanso [62]2 years ago
6 0

Answer:

<h3>A.</h3><h3>Explanation:</h3><h3>Because i took the practice on usatestprep!</h3>
nataly862011 [7]2 years ago
3 0

Answer:

A.

The more friction experienced means less movement.

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A race car rounding a corner at a constant speed of 200 miles per hour.
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Answer:

Yes since it is changing direction

Explanation:

A race car rounding a corner at a constant speed of 200 miles per hour

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2 years ago
Asteroid Ida was photographed by the Galileo spacecraft in 1993, and the photograph revealed that the asteroid has a small moon,
Nady [450]

Answer:

The orbital speed of Dactyl is 5.55m/s

Explanation:

The orbital speed can be determined by the combination of the universal law of gravity and Newton's second law:

F = G\frac{M \cdot m}{r^{2}}  (1)

Where G is gravitational constant, M is the mass of the asteroid, m is the mass of the moon and r is the distance between them

In the other hand, Newton's second law can be defined as:

F = ma  (2)

Where m is the mass and a is the acceleration

Then, equation 2 can be replaced in equation 1

m\cdot a  = G\frac{M \cdot m}{r^{2}}  (2)

However, a will be the centripetal acceleration since the moon Dactyl describe a circular motion around the asteroid

a = \frac{v^{2}}{r}  (3)

m\frac{v^{2}}{r} = G\frac{M \cdot m}{r^{2}} (4)

Therefore, v can be isolated from equation 4:

m \cdot v^{2} = G \frac{M \cdot m}{r^{2}}r

m \cdot v^{2} = G \frac{M \cdot m}{r}

v^{2} = G \frac{M \cdot m}{rm}

v^{2} = G \frac{M}{r}

v = \sqrt{\frac{G M}{r}} (5)

Finally, the orbital speed can be found from equation 5:

Notice, that it is necessary to express r in units of meters.

r = 95km \cdot \frac{1000m}{1km} ⇒ 95000m

v = \sqrt{\frac{(6.672x10^{-11}N.m^{2}/kg^{2})(4.4x10^{16}kg)}{95000m}}

v = 5.55m/s

Hence, the orbital speed of Dactyl is 5.55m/s

3 0
2 years ago
Which source is considered a primary source of scientific information? an original research article in a scientific journal a re
Nitella [24]
The primary source would be the original article published in a scientific journal. All other choices would be based on information from the original article.

Newspapers would only pick up the information from the journal itself, or from the authors. Books follow after the original article, after it has gained momentum among the research community. The public lecture at a museum would be based on work from the journal article.
6 0
3 years ago
Read 2 more answers
In a racquetball game, your opponent repeatedly hits the same type of serve off the front wall and it lands in approximately the
Kaylis [27]

Answer:

b

Explanation:

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Which type radiation can be observed well from Earth's surface?
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Answer:

Eletromagnetic radiation which is also known as visible light.

Explanation:

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