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melamori03 [73]
3 years ago
12

When 2 forces are applied in opposite directions, how do you calculate the net force?

Physics
1 answer:
Effectus [21]3 years ago
3 0
You find the net force by subtracting.
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<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B%5Csqrt%7B4%7D%20%3D87" id="TexFormula1" title="x^{2} +\sqrt{4} =87" alt="x^{
Alja [10]

Answer:

<h2><em><u>ᎪꪀsωꫀᏒ</u></em></h2>

➪x= √ 85

Explanation:

x²+√4 = 87

=> x²+2 = 87

=> x² = 87-2

=> x²= 85

=> x= √85

7 0
2 years ago
Where conventional relays, contactors and switches, which have arcing contacts, are installed in Class I, Division 1 and 2 locat
solmaris [256]

Answer:

They must be enclosed in explosion proof housing or general-purpose housing (as per NEC Regulations)

Explanation:

It is important to know what are Class I, Division 1 and 2 locations.

Class I: includes those industries or places where flammable gases exists and there are chances of explosions.

Division 1: Those places where hazard can happen under normal operating conditions

Division 2: Those places where hazard can happen under abnormal conditions.

The conventional relays, contactors and switches cause arcing when they operate and this is a completely normal phenomenon but with respect to these categories, it is very dangerous to operate such electrical devices without any precaution.

Therefore industries are required by the regulatory authorities to install  explosion proof housing to enclose conventional relays, contactors and switches to avoid any explosion or hazard. General-purpose housing can also be used given that it follows the regulations provided by the NEC or any other regulatory authority.

7 0
3 years ago
1. Choose the statement that does not accurately describe observations
erastova [34]

Answer:What are the statements?

Explanation:

3 0
3 years ago
Read 2 more answers
Why does sugar sink to the bottom of the teacup (for science btw)
TEA [102]
I know what you are wondering and the answer is simply crystals are more dense than water , so they sink but if you warm it up they can combine with it to become one.
dose this help?
3 0
3 years ago
A proton is confined in an infinite square well of width 10 fm. (The nuclear potential that binds protons and neutrons in the nu
kvasek [131]

Answer:

First Question

    E   =   1.065*10^{-12} \  J

Second  Question

   The  wavelength is for an X-ray  

Explanation:

From the question we are told that

     The  width of the wall is  w =  10\ fm =  10*10^{-15 }\ m

     The  first excited state is  n_1  =  2

     The  ground state is   n_0 = 1

Gnerally the  energy (in MeV) of the photon emitted when the proton undergoes a transition is mathematically represented as

          E   =   \frac{h^2 }{ 8 * m  *  l^2 [ n_1^2 - n_0 ^2 ] }

Here  h is the Planck's constant with value  h =  6.62607015 * 10^{-34} J \cdot s

         m is the mass of proton with value m  = 1.67 * 10^{-27} \   kg

So    

          E  =   \frac{( 6.626*10^{-34})^2 }{ 8 * (1.67 *10^{-27})  *  (10 *10^{-15})^2 [ 2^2 - 1 ^2 ] }

=>        E   =   1.065*10^{-12} \  J

Generally the energy of the photon emitted is also mathematically represented as

             E  =  \frac{h * c }{ \lambda }

=>          \lambda  =  \frac{h * c }{E }

=>          \lambda  =  \frac{6.62607015 * 10^{-34} * 3.0 *10^{8} }{ 1.065 *10^{-15 } }

=>         \lambda  =  1.87*10^{-10} \  m

Generally the range of wavelength of X-ray is  10^{-8} \to  1)^{-12}

So this wavelength is for an X-ray.

     

8 0
3 years ago
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