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AlekseyPX
3 years ago
13

Pls help will give brainlist

Physics
1 answer:
ale4655 [162]3 years ago
3 0
Potential energy

potential energy is the stored energy an object has, the bike is not moving and it just sitting on the hill, with the stored energy
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Uranium mining is not very disruptive of the land, and therefore nuclear power is much more desirable than coal mining. TRUE FAL
erik [133]
The answer to your question is True. 
Hope this helped...even though your question has been answered seven days later. 
Better late than never xD
5 0
4 years ago
Read 2 more answers
A +7.5 nC point charge and a -2.0 nC point charge are 3.0 cm apart. What is the electric field strength at the midpoint between
eduard

Answer:

Ep= 3.8 10⁵ N/C

Explanation:

Conceptual analysis

The electric field at a point P due to a point charge is calculated as follows:

E = k*q/d²

E: Electric field in N/C

q: charge in Newtons (N)

k: electric constant in N*m²/C²

d: distance from charge q to point P in meters (m)

Equivalence

1nC= 10⁻⁹C

1cm= 10⁻²m

Data

k= 9*10⁹ N*m²/C²

q₁ =+7.5 nC = +7.5*10⁻⁹C  

q₂ =  -2.0 nC = -2.0*10⁻⁹C

d₁ =d₂ = 1.5cm = 1.5 *10⁻²m  = 0.015 m

Calculation of the electric fieldsat the midpoint (P) between the two charges

Look at the attached graphic:

E₁: Electric Field at point ;Due to charge q₁. As the charge q₁ is positive negative (q₁+), the field leaves the charge .

E₂: Electric Field at point : Due to charge q₂. As the charge q₂ is negative (q₂-) ,the field enters the charge

E₁ = k*q₁/d₁² = 9*10⁹ *7.5  *10⁻⁹/ ( 0.015 )² = 3*10⁵ N/C

E₂ = k*q₂/d₂²= 9*10⁹ *2*10⁻⁹/( 0.015 )² = 0.8*10⁵ N/C

The electric field at a point P due to several point charges is the vector sum of the electric field due to individual charges.

Ep= E₁ + E₂  

Ep= 3*10⁵ N/C +  0.8*10⁵ N/C

Ep= 3.8 10⁵ N/C

8 0
4 years ago
A right triangle has sides measuring 5 and 12 inches. If the two vectors have a magnitude of 5 and 12 and are at right angles to
ollegr [7]

Answer:

x=13

Explanation:

From the question we are told that

Magnitude 1 M_1=5

Magnitude 1 M_2=12

Generally the Pythagoras equation for the magnitudes is mathematically given as

\sqrt{x^2}=\sqrt{M_1^2 +M_2^2}

\sqrt{x^2}=\sqrt{5^2 +12^2}

x=13

Therefore resultant magnitude is

x=13

8 0
3 years ago
When we double the distance between a source of light and the
FinnZ [79.3K]

When we double the distance between a source of light and the

surface on which it falls, the amount of illumination on the surface

decreases to <em>one fourth (1/4, 0.25))</em> of the original illumination.

7 0
4 years ago
Consider the specific example of a positive charge q moving in the +x direction with the local magnetic field in the +y directio
Leto [7]

Answer:

Therefore the direction is in the <u>positive direction of the z axes</u>.

Explanation:

Let's recall that the magnetic force is given by:

F_{B}=q(\vec{v} \times \vec{B})

The unit vector of V is \hat{i} and the unit vector of B is \hat{j}

So, the direction of the force will be defined as the cross product of i and j, and using the right hand rule:

\hat{i} \times \hat{j} = \hat{z}

Therefore the direction of the magnetic force is in the <u>positive direction of the z axes</u>.

I hope it helps you!

4 0
4 years ago
Read 2 more answers
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