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mixas84 [53]
3 years ago
15

As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it? As a rock sinks deepe

r and deeper into water of constant density, what happens to the buoyant force on it? It increases. It may increase or decrease, depending on the shape of the rock. It may increase or decrease, depending on the weight of the rock. It remains constant. It decreases. g
Physics
1 answer:
Sidana [21]3 years ago
3 0

Answer:

It remains constant

Explanation:

As we know that buoyant force on an object given as

Fb = ρ Vd g

ρ= Density of fluid

Vd=Volume displace by body

g=10 m/s²

Fb =buoyant force

So from above we can say that buoyant force does not depends on the depth. It only depends on the fluid density and volume displace by body.

So when rock gets deeper and deeper the buoyant force will remain constant.

It remains constant

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A 100 Ohm, 200 Ohm, and 400 Ohm resistors are in parallel with each other. What is the equivalent
krok68 [10]

Answer:

1/R = 1/R1 + 1/R2 + 1/R3

1/1 + 1/2 + 1/4 = 1 + .5 + .25 = 1.75

1/1.75 = .572

multiplying this by 100 gives us

R = 57.2 ohms

The smallest resistor (100 ohms) will draw the most current

(One can also use R = R1 R2 R3 / (R1 R2 + R1 R3 + R2 R3)

7 0
3 years ago
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a ball is thrown straight upward from ground level with a velocity of 41 m/s how much time passes before the ball hits the groun
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Vf = Vi - gt
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6 0
3 years ago
PLEASE HELP A car accelerates from rest at 2.92 m/s2 What is the velocity at the end of 5.1 s? Answer in units of m/s. What is t
uranmaximum [27]

Answer:

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a=2.92m/s2

t=5.1s

vf=?

v0=0

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Explanation:

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6 0
3 years ago
Two microwave signals of nearly equal wavelengths can gener- ate a beat frequency if both are directed onto the same microwave d
Sonja [21]

Answer:

the longer wavelength is 1.2552 cm

Explanation:

given that

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λ₁ = 1.250 cm = 0.0125 m

we know that beat frequency f_{b} of two simultaneous frequencies f₁ and f₂ is expressed as;

f_{b}  = | f₁ - f₂ |

we know that microwave travels at a speed of light, so for any electromagnetic wave traveling at speed of light c with wavelength λ; frequency is;

f = c / λ

hence our beat frequency f_{b} becomes

f_{b} = c ( 1/λ₁ - 1/λ₂)

to find the longer wavelength,  λ₂

f_{b} = c ( 1/λ₁ - 1/λ₂)

divide both side by c

f_{b} /c =  ( 1/λ₁ - 1/λ₂)

1/λ₂ = 1/λ₁ - f_{b} /c

λ₂ =  [1/λ₁ - f_{b} /c ]⁻¹

so we substitute in our values

we know that speed of light c = 3 × 10⁸

so

λ₂ =  [ (1/0.0125) - (100 × 10⁶ /3 × 10⁸) ]⁻¹

λ₂ =  [80 - 0.3333 ]⁻¹

λ₂ =  [79.6667 ]⁻¹

λ₂ =  0.01255 m

λ₂ =  0.012552 × 100 cm

λ₂ =  1.2552 cm

Therefore, the longer wavelength is 1.2552 cm

7 0
3 years ago
Ability of the muscles to function effectively and efficiently without undue fatigue​
andre [41]

Answer:

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Explanation:

8 0
3 years ago
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