Answer:3W
If it takes an amount of work W to move two q point charges from infinity to a distance d apart from each other, then how much work should it take to move three q point charges from infinity to a distance d apart from each other?
A) 2W
B) 3W
C) 4W
D) 6W
Explanation: calculating work done,W, in moving two positive q point charges from infinity to a valued distance d from each other is
W = k(+q)(+q)/ d
k is couloumb's constant
work done in moving 3 equal positive charges from infinity to a finite distance is given by
W₂=W₄=W₆=k(+q)(+q)/ d
Total work done, W' =k(+q)(+q)/ d + k(+q)(+q)/ d + k(+q)(+q)/ d
= W + W + W = 3W
Answer:
c. initial (x and y)
Explanation:
When a projectile is launched at a velocity with a launch angle, to solve it, we must first resolve the initial velocity into the x and y components. To do this will mean we have to treat it like a triangle due to the launch angle and the direction of the projectile.
Therefore, we will have to make use of trigonometric ratios which is also known by the mnemonic "SOH CAH TOA"
Thus, this method resolves the initial x and y velocities.
-16 km/hr/sec because she slows down 4 km/hr (12 - 8) in 0.25 seconds. in one second (0.25 sec * 4) she would slow down by 16 km/hr (4 * 4). it’s negative acceleration because she’s slowing down
the <u>average powe</u><u>r</u> output of the sun is <u>3.8 × </u>
<u> W</u> given that about 1350 w/m2 reaches the upper atmosphere of the earth.
As we know intensity falling over a surface is equal to Energy falling per unit area per unit volume.
I = 
Since Power is equal to energy/time
I = power/area
or
Power = Intensity × area
Now, Distance from Sun to Earth , r = 149.6 ×
m
So, Surface area of the sphere of radius is:
A = 4 π 
= 4 × 3.14 × (149.6 ×
)²
= 2.81 ×
m²
Thus Average Power output of the sun will be:
P = 1350 × 2.81 × 
= 3.7935 × 
P = 3.8 ×
W
So the average power output of the sun is 3.8 ×
W.
If you need to learn more about about the average power of a resistor, click here.
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Answer:
El peso de la persona B es la mitad del peso de la persona A.
Explanation:
El peso de la persona B puede calcularse con la siguiente ecuación:
(1)
En donde:
: es la masa de la persona B
g: es la gravedad
Dado que la persona B tiene la mitad de la masa de la persona A, tenemos:
(2)
En donde:
: es la masa de la persona A
Al introducir la ecuación (2) en (1) nos queda:
(3)
Sabemos que el peso de la persona A está dado por:
(4)
Entonces, al introducir la ecuación (4) en (3) tenemos:
Por lo tanto, el peso de la persona B es la mitad del peso de la persona A.
Espero que te sea de utilidad!