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inna [77]
3 years ago
14

A rug sits in a sunny place on the floor for a long time. Kiara thinks that light from the sun can cause the rug's color to fade

over time. Can light from the sun cause the rug's color to fade?
Physics
1 answer:
geniusboy [140]3 years ago
3 0

Answer:

Yes! Light from the sun can affect the materials certain carpets are made out of. The usual effect being the dye in the carpet being "washed out" or "dried out" as the sun beams down on it. When this happens, the carpet will usually lose its color, causing it to fade.

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What is electric resistance?
andriy [413]
Electrical resistance is opposition to the flow of current in an electric circuit: resistance converts electrical energy to thermal energy, and in this regard is similar to mechanical friction. Resistances are said to dissipate electrical energy as heat.
4 0
3 years ago
Read 2 more answers
Black holes are suspected when a visible star is being noticeably
olganol [36]

a) The mass of the black hole is 9.94\cdot 10^{30} kg

b) The black hole is 5 times more massive than the sun

Explanation:

a)

The magnitude of the gravitational force between the black hole and the star is:

F=G\frac{m M}{r^2}

where :

G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2} is the gravitational constant

m is the mass of the star

M is the mass of the black hole

r is the separation between the objects

According to Newton's second law, the force acting on the star can be also written as

F=ma

where a is the acceleration

Combining the two equations,

a=\frac{GM}{r^2}

where:

r=9.4 \cdot 10^{10} m is the distance between the two objects

a=0.075 m/s^2 is the acceleration of the star

Solving for M, we find the mass of the black hole:

M=\frac{ar^2}{G}=\frac{(0.075)(9.4\cdot 10^{10})^2}{6.67\cdot 10^{-11}}=9.94\cdot 10^{30} kg

b)

The mass of the Sun is:

M_s = 1.99\cdot 10^{30} kg

while the mass of the black hole in this problem is

M=9.94\cdot 10^{30} kg

Therefore, the mass of the black hole written in terms of the solar mass is:

\frac{M}{M_s}=\frac{9.94\cdot 10^{30}}{1.99\cdot 10^{30}}=5

So, the black hole is 5 times more massive than the sun.

Learn more about gravitational force:

brainly.com/question/1724648

brainly.com/question/12785992

#LearnwithBrainly

7 0
3 years ago
Label each part, what do they mean?
Blababa [14]

Answer:

help me and i'll help you ??

Explanation:

4 0
3 years ago
How is the size of the mri signal related to the applied b0 field?
lianna [129]

Answer:

Intensity Of MRI signal is related as square of B_{0}

or

Intensity is related as B_{0}^{2}.

Explanation:

MRI simply means Magnetic Resonance Imaging. In this process by the resonance of magnetic field the frequency is produced which is used to image the body parts (Mainly the brain).

The signal Strength is the rate of change of Magnetization (M) with respect to the time. For the calculation of Intensity we use Bloch equation which is given by

\frac{dH}{dt} = M \times \gamma B

On further solving

\frac{dH}{dt} =\mu B \times \gamma B \\\frac{dH}{dt} = \mu \times \gamma B^{2}

So, Intensity is related as B_{0}^{2}.

8 0
3 years ago
A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Assume
ahrayia [7]

Answer:

<em>12.23m/s</em>

Explanation:

<em>Let's recall that</em>

<em />

<em>The Initial momentum in (East)axis  = 900 x 15 which is = 13500 N-s </em>

<em> </em>

<em>Initial momentum in (North) axis = 750 x 20 which is = 15000 N-s </em>

<em />

<em>Total initial momentum  becomes = √[(13500)^2 + (15000)^2] = 20180.44 N-s </em>

<em> The  initial momentum direction is  at θ* East of North </em>

<em />

<em> Therefore, tanθ = 13500/15000 = 0.9 = tan42* </em>

<em>  tanθ=42</em>

<em> </em>

<em>The speed of the wreckage after collection is,</em>

<em />

<em>Recall that The law of momentum conservation states that </em>

<em>Momentum initial = Momentum final </em>

<em> </em>

<em>20180.44 = (900+750) x v </em>

<em> </em>

<em>v = 12.23 m/s</em>

8 0
3 years ago
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