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Brut [27]
3 years ago
15

How do the four fundamental forces differ?

Physics
1 answer:
Basile [38]3 years ago
4 0
Look at the first person’s answer. Cause I know I’m wrong
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A 1-m-tall barrel is closed on top except for a thin pipe extending 4.2 m up from the top. When the barrel is filled with water
Dmitry_Shevchenko [17]

Answer:

P = 52 kPa

Explanation:

Hidrostatic pressure is defined as the product of the height of liquid (h) by its specific weight (ρ) and by the acceleration of gravity (g).

In the first scenario, the atmospheric pressure is:

10,000 = \rho g h_{1}\\10,000 = \rho g*1\\\rho g = 10,000

In the second scenario, h = 4.2 + 1 m. Therefore, the pressure at the bottom of the barrel is:

P= \rho g h_{2}\\P= 10,000*5.2\\P=52,000\\P=52kPa

The pressure on the bottom when water is added to fill the pipe to its top is 52 kPa.

4 0
3 years ago
When two waves meet and result in resonance, how is the resultant wave different from the original waves?
Nat2105 [25]
At resonance, a standing wave is produced, and is one in which two waves superimpose to produce a wave that varies in amplitude but does not propagate, forming a single wave of one frequency, wavelength, and speed. The resultant wave has a higher amplitude. 
<span>The right answer is B) It has a greater amplitude.</span>
4 0
3 years ago
In each part calculate the kinetic energy of the given objects in joules a) an automobile whose mass is 1260kg moving at a speed
Contact [7]

a)

Kinetic energy (KE) = 1/2 m v^2

Where:

m = mass = 1260 kg

v = speed = 66.3 km/h = 18.42 m/s

Replacing:

KE = 1/2 (1260 kg ) (18.42 m/s )^2 = 213,756.7 J

5 0
1 year ago
What information is needed to determine the orientation of an orbital?
kolbaska11 [484]

Answer:

The magnetic quantum number (l) determines the orientation of an orbital

Explanation:

The magnetic quantum number of an electron's orbital is the spatial orientation of the electron's orbital

The magnetic quantum number, ml, specifies the orientation and number of orbitals of electrons in a subshell. The value of the magnetic quantum number is dependent on the angular momentum quantum number I with values ranging from -I to +I.

The shape of the electron's orbital is determined by the angular momentum quantum number.

8 0
3 years ago
single goose sounds a loud warning when an intruder enters the farmyard. Some distance from the goose, you measure the sound lev
Goryan [66]

Answer:

The sound level of the 26 geese is  Z_{26}= 96.15 dB

Explanation:

From the question we are told that

    The  sound level is Z_1 =  81.0 \ dB

     The number of geese is N = 26

Generally the intensity level of sound is mathematically represented as

        The intensity of sound level in dB  for one  goose is mathematically represented as

                       Z_1 = 10 log [\frac{I}{I_O} ]

Where I_o is the  threshold level of intensity with value  I_o = 1*10^{-12} \  W/m^2

            I is the intensity for one goose in W/m^2

For 26 geese the intensity would be  

          I_{26} = 26 * I

   Then  the intensity of 26 geese in dB is  

              Z_{26} = 10 log[\frac{26 I }{I_o} ]

               Z_{26} = 10 log (\ \ 26 *  [\frac{ I }{I_o} ]\ \ )

               Z_{26} = 10 log (\ \ 26  \ \ ) *   (\ \  10 log [\frac{ I }{I_o} ]\ \ )

 From the law of logarithm we have that

              Z_{26} = 10 log 26 +  10 log [\frac{I}{I_0} ]

                    = 14.15 + 82

                    Z_{26}= 96.15 dB

               

               

           

4 0
3 years ago
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