An electric field has both magnitude and direction.
I don't think that's one of the first 3 choices.
Well let's see:
A). No. A capacitor doesn't measure anything.
B). No. The power delivered to the circuit is determined by
the battery or power supply and all the things in
the circuit that dissipate energy. A capacitor doesn't
do any of these things.
C). No. If any current actually flows between its plates,
the capacitor is shot and can't do its job, and
must be replaced.
D). Yes. A capacitor stores charges on its plates, and
electrical energy in the field between its plates.
Answer:
The value speed is ![v = 8.192 \ m/s](https://tex.z-dn.net/?f=v%20%20%3D%20%208.192%20%5C%20m%2Fs)
Explanation:
From the question we are told that
The mass of the ping pong ball is
The radius is ![r = 0.020 \ m](https://tex.z-dn.net/?f=r%20%3D%20%200.020%20%5C%20%20m)
The depth of the ping pong inside the water is
Gnerally the force with which the ball will emerge will from the water is mathematically represented as
![F = B - m g](https://tex.z-dn.net/?f=F%20%20%3D%20%20B%20%20-%20%20m%20g)
Here B is the Buoyant force on the ball which is mathematically represented as
![B = \rho_w * V_b * g](https://tex.z-dn.net/?f=B%20%20%3D%20%20%5Crho_w%20%2A%20V_b%20%20%2A%20%20g)
Here
is the volume of the ball which is mathematically represented as
![V_b = \frac{4}{3} * \pi * r^3](https://tex.z-dn.net/?f=V_b%20%20%3D%20%20%5Cfrac%7B4%7D%7B3%7D%20%20%2A%20%5Cpi%20%2A%20r%5E3)
=> ![V_b = \frac{4}{3} * 3.142 * 0.020 ^3](https://tex.z-dn.net/?f=V_b%20%20%3D%20%20%5Cfrac%7B4%7D%7B3%7D%20%20%2A%203.142%20%20%2A%200.020%20%5E3)
=> ![V_b = 3.35*10^{-5} \ m^3](https://tex.z-dn.net/?f=V_b%20%20%3D%203.35%2A10%5E%7B-5%7D%20%5C%20%20m%5E3)
is the density of water with value ![\rho_w = 1000 \ kg/m^3](https://tex.z-dn.net/?f=%5Crho_w%20%3D%20%201000%20%5C%20kg%2Fm%5E3)
So
![B = 1000 * 3.35*10^{-5} * 9.8](https://tex.z-dn.net/?f=B%20%20%3D%20%201000%20%20%2A%203.35%2A10%5E%7B-5%7D%20%20%2A%20%209.8)
=> ![B = 0.3284 \ N](https://tex.z-dn.net/?f=B%20%20%3D%200.3284%20%5C%20%20N)
So
![F = 0.3284 - 0.0027 * 9.8](https://tex.z-dn.net/?f=F%20%20%3D%200.3284%20%20%20%20-%20%200.0027%20%2A%209.8)
=> ![F = 0.3284 - 0.02646](https://tex.z-dn.net/?f=F%20%20%3D%200.3284%20%20%20-%20%200.02646)
=> ![F = 0.3020 \ N](https://tex.z-dn.net/?f=F%20%20%3D%20%200.3020%20%20%5C%20N)
Generally force is mathematically represented as
![F = m * a](https://tex.z-dn.net/?f=F%20%20%3D%20%20m%20%2A%20%20a)
So
![0.3020 = 0.0027 * a](https://tex.z-dn.net/?f=0.3020%20%3D%20%200.0027%20%2A%20%20a)
=> ![a = 111.84 \ m/s^2](https://tex.z-dn.net/?f=a%20%3D%20%20111.84%20%5C%20%20m%2Fs%5E2)
Generally from kinematic equation
![v^2 = u^2 + 2as](https://tex.z-dn.net/?f=v%5E2%20%3D%20u%5E2%20%2B%202as)
Here u is the velocity of the ping pong at depth of 0.3 m and the value is zero given that at that point there was no motion
So
![v^2 = 0^2 + 2 * 111. 84 * 0.3](https://tex.z-dn.net/?f=v%5E2%20%3D%200%5E2%20%2B%202%20%2A%20%20111.%2084%20%2A%200.3)
=> ![v = 8.192 \ m/s](https://tex.z-dn.net/?f=v%20%20%3D%20%208.192%20%5C%20m%2Fs)
consider the motion of projectile A in vertical direction :
v₀ = initial velocity of projectile A in vertical direction = 0 m/s (since the projectile was launched horizontally)
a = acceleration of the projectile = g = acceleration due to gravity = 9.8 m/s²
t = time of travel for projectile A = 3.0 seconds
Y = vertical displacement of projectile A = height of the cliff = h = ?
using the kinematics equation along the vertical direction as
Y = v₀ t + (0.5) a t²
h = (0) (3.0) + (0.5) (9.8) (3.0)²
h = 44.1 m
Salt is a compound Its a compound