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Furkat [3]
3 years ago
15

Determine the position in which a solid cylindrical block of wood of diameter 0.3 m and length 0.4 m will float in water. Take s

pecific gravity of wood as 0.5
Physics
1 answer:
yan [13]3 years ago
4 0

Answer:

0.2 m

Explanation:

Diameter = 0.3 m

radius, r = 0.15 m

Length, H = 0.4 m

density of wood, d = 0.5 g/cm^3 = 500 kg/m^3

density of water, d = 1000 kg/m^3

Let h be the depth of cylinder immersed in water.

By the principle of floatation.

Buoyant force = Weight of cylinder

Volume immeresed x density of water x g = Volume of cylinder x density of wood x g

A x h x 1000 x g = A x H x 500 x g

1000 h = 500 x 0.4

h = 0.2 m

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Which part of a wind-powered system ultimately produces the electricity? A. nacelle B. blade C. turbine D. generator
djverab [1.8K]
<span>The correct answer is: (D) Generator

Explanation:
In wind-powered systems, the wind energy turns the blades around the rotor of a wind turbine. That rotor is connected to a generator that generates electricity. In other words, the kinectic energy of the wind is converted into electrical energy by using the generator in the wind-powered systems.</span>
5 0
3 years ago
Read 2 more answers
Two light bulbs are 2.0 m apart. From what distance can these light bulbs be marginally resolved by a small telescope with a 4.5
andrezito [222]

Answer:

R = 1.2295 10⁵  m

Explanation:

After reading your problem they give us the diameter of the lens d = 4.50 cm = 0.0450 m, therefore if we use the Rayleigh criterion for the resolution in the diffraction phenomenon, we have that the minimum separation occurs in the first minimum of diffraction of one of the bodies m = 1 coincides with the central maximum of the other body

            θ = 1.22 λ / D

where the constant 1.22 leaves the resolution in polar coordinates and D is the lens aperture

             

how angles are measured in radians

          θ = y / R

where y is the separation of the two bodies (bulbs) y = 2 m and R the distance from the bulbs to the lens

            \frac{y}{R} = 1.22 \frac{ \lambda}{D}

            R = \frac{ y \ D}{1.22 \lambda}

let's calculate

            R = \frac{ 2 \ 0.045}{ 1.22 \ 600 \ 10^{-9}}

            R = 1.2295 10⁵  m

3 0
3 years ago
When air cools, it holds _____ water than when it is warmer.
Blizzard [7]
It holds A. Less water than when it is warmer.
6 0
3 years ago
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Some sharks can swim at average cruising speeds of three miles per hour. If a shark swam at that average speed for seven hours,
kari74 [83]

Answer:

21 miles

Explanation:

3 miles an hour for 7 hours

Its simply 7m*3m/hr=21 miles

8 0
3 years ago
Calculate kinetic energy of an 86kg scooter moving at 18 m/s
myrzilka [38]

Calculate the kinetic energy of an 86-kg scooter moving at 18 m/s?

K.E.      =      (1/2)mv^2

K.E.      =        (1/2)86   *   18^2

K.E.       =         (Answer  Unit)     =====>    J

M     =      86kg

V      =        18 m/s

Significant Figures  ======>    6

Answer:   ======>   KE     =      13932 J



Show work:

1/2  *    86   *   18^2

(1/2)86  *  18^2

Remove Parenthesis:      

a        =       a

1/2 *  86  *  18^2

Multiply Fractions:

a * b/c     =    a  *  b/c

=     1  *  86  *  18^2/2

Multiply the numbers:

1  *  86     =     86

18^2    *    86/2

Divide the numbers:

86/2     =     43

18^2   *    43

18^2     =     324

43    *    324

Multiply the numbers:

43   *    324

13932

Therefore,  Your answer   is    KE    =     13932 J



Hope that helps!!!!                                   : )  sorry for the long explanation!!!








7 0
3 years ago
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