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KiRa [710]
3 years ago
10

Please help me on this I know it’s not B this stuff is kinda hard for me

Physics
1 answer:
Liula [17]3 years ago
7 0

There you go again.  Newton's 3rd Law says "for every action there is an EQUAL OPPOSITE reaction.".

<u><em>EQUAL</em></u><em> </em>and <u><em>OPPOSITE</em></u>

If THIS MUCH force pushes the bullet THAT way, then THE SAME amount of force pushes the rifle THIS way.

The bullet pushes backward on the rifle with the <u>same</u> amount of force as the rifle exerts on the bullet.

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If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them?
Savatey [412]

Answer:

According to II law of thermodynamics the heat always transfers from high temperature to low temperature body without aid of any external energy. So, according to this law the heat transfers from cup of coffee to the person body until both bodies reaches to the equilibrium state.

After attaining the equilibrium state, the heat transfer may be ceases between the bodies.

Whenever the person touches the hot coffee, he senses the heat that means the heat is transferring in to his body.

7 0
4 years ago
Read 2 more answers
A charge of +2 C is at the origin. When charge Q is placed at 2 m along the positive x axis, the electric field at 2 m along the
sveticcg [70]

Answer:

The value of Q is - 8 C

Explanation:

Given;

the magnitude of first charge = 2 C

position of the first charge = 0

         _ (2m)                            0(+2C)                         +(2m)(Q)

------------------------------------------------------------------------------------

                                                E₁ --------------------------------->                                    

            <------------------------------------------------------------------ E₂

E₁ and E₂ are equal in magnitude but opposite in direction

| E₂ | = | E₁ |

\frac{K*Q}{r^2} = \frac{K*2}{r^2} \\\\\frac{Q}{(4)^2} = \frac{2}{(2)^2}\\\\\frac{Q}{16} =\frac{2}{4}\\\\\frac{Q}{16} =\frac{1}{2}\\\\2Q = 16\\\\Q = 8 \ C

Thus, since E₂ is opposite in direction to E₁, the Q = - 8 C

6 0
4 years ago
A bicycle wheel rotates counterclockwise at a constant rate. You can use one of the wheel’s spokes to measure the wheel’s angula
nevsk [136]

Answer: s=delta/360° ×2πr

Explanation:

The center of the wheel is located.The distance from the centre spoke to the outside wheel is the radius r...the distance between two spokes in the wheels is an arc which forms an angle(theta) at the centre... It is a fraction of the angle formed at the middle to the total angle of the wheel(360° as in circle) to the product of the circumference of the wheel(circle)

Length of arc(s)=theta/360 ×2πr

4 0
3 years ago
what is the voltage in mv across an 5.5 nm thick membrane if the electric field strength across it is 5.75 mv/m? you may assume
inn [45]

Answer:

V = 31.62 m V

Explanation:

Given,

Voltage across thick membrane = ?

Thickness of the membrane, d = 5.5 n m

Electric field = 5.75 M V/m

we know

E = \dfrac{V}{d}

   V = E d

   V = 5.75 x 10⁶ x 5.5 x 10⁻⁹

   V = 31.62 x 10⁻³ V

   V = 31.62 m V

Hence, The Voltage across the membrane is equal to 31.62 m V.

3 0
4 years ago
The amount of dissolved oxygen in water may decrease because of the 
Elanso [62]
<span>The amount of dissolved oxygen in water may decrease because of the increase in organic matter in the water. <span>Aquatic organisms breathe and use oxygen. Large amounts of oxygen are consumed by the decomposition of bacteria (when there are large amounts of dead matter to decompose, there will be a significant number of bacteria). Examples: dead organic matter (algae), wastewater, garden waste, oils and fats, all this results in a decrease in dissolved oxygen in the water.</span></span>
8 0
3 years ago
Read 2 more answers
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