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Lera25 [3.4K]
3 years ago
12

When we use an analogy that represents the expanding universe with the surface of an expanding balloon, what does the inside of

the balloon represent?
Physics
1 answer:
svetlana [45]3 years ago
7 0

Answer:  When we use an analogy that represents the expanding universe with the surface of an expanding balloon, what does the inside of the balloon represent? The inside of the balloon does not represent any part of our universe.

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A particle's velocity is described by the function vx = kt 2 m/s, where k is a constant and t is in s. The particle's position a
vodomira [7]

Answer:

The value of the constant k is 2

Explanation:

We have the equation of the velocity v_{x} = kt² , where k

is constant and t is the time in second

The particle's position at t_{0} = 0 is x_{0} = -9 m

The particle's position at t_{1} = 3 s is x_{1} = 9 m

We need to find the value of the constant k

The relation between the velocity and the displacement in a particular

time is x = \int\ {v_{x} } \, dt

Remember in integration we add power by 1 and divide the expression

by the new power

→ x = \int\ {kt^{2} } \, dt=\frac{1}{3}kt^{3}+c

c is the constant of integration to find it substitute the initial value of x

and t in the equation of x

→ t_{0} = 0 , x_{0} = -9 m

→ -9 = \frac{1}{3} k (0)³ + c

→ -9 = c

Substitute the value of c in the equation of x

→ x = \frac{1}{3} k t³ - 9

To find k substitute the values of  t_{1} = 3 s , x_{1} = 9 m

→ 9 = \frac{1}{3} k (3)³ - 9

→ 9 = \frac{1}{3} (27) k - 9

→ 9 = 9 k - 9

Add 9 to both sides

→ 18 = 9 k

Divide both sides by 9

→ k = 2

<em>The value of the constant k is 2</em>

5 0
3 years ago
Which of these is an illuminated source of light? A. the sun B. a star C. the earth seen from the moon D. a meteorite as it burn
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C. the earth seen from the moon . The others are luminous objects
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Compare and contrast fission and fusion
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Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
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4 years ago
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A would be the wavelength, C would be a crest, D would be the amplitude, leaving B which is the trough.

8 0
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A cable-operated clutch is being adjusted. Technician A says that free travel is measured at the clutch pedal and should be betw
Alexxandr [17]

Answer: A

Technician A only 

Explanation:

On a cable-operated clutch, the adjustment is made at the cable end. The clearance is usually measured either at the operating lever or at the pedal.

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