1. <span>FX = 0 since the bottom charges are symmetrical about the y axis and the top charge is aligned with the y-axis
3. </span><span>FY > 0 since the bottom charges do not equate the top charge. The bottom charges have horizontal components which is less than q and adding them all, will not result to 3q.</span>
Answer:
B- He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.
Explanation: Dissolving Salt in water is a Chemical Change, Because the Salt arrangement is different in solid state than dissolved in water. As we can see in the image below, once the Salt is dissolved, it is separated into its ions, Na+ and Cl- Now, The evaporation process is a physical change, because the water doesn´t change its configuration H20 and it only changes its form, as we can see in the image below.
Answer:
Explanation:
If V be the potential difference which creates velocity v
Ve = 1/2 m v²
e is charge on the particle , m be the mass .
If V is tripled , v becomes √3 times , so velocity becomes √3 v .
in magnetic field , the path becomes circular
for radius of the circle , the relation is
m v² / R = Be v , B is magnetic field
R = m v / B e
So R is proportional to velocity
If velocity becomes √3 times , radius too becomes √3 times
new radius = √3 x 5
= 8.66 cm.
b )
For angular frequency ω = v / r = velocity / radius
velocity = 5 x 10⁴ m / s , r = 8.66 x 10⁻² m
= 5 x 10⁴ / 8.66 x 10⁻²
= .577 x 10⁶ rad / s
= 5.77 x 10⁵ rad / s
Answer:
Electric current produces a magnetic field. This magnetic field can be visualized as a pattern of circular field lines surrounding a wire. ... Magnetic Field Generated by Current: (a) Compasses placed near a long straight current-carrying wire indicate that field lines form circular loops centered on the wire.
Explanation:
Answer:
The ball travels a distance of 20 m in the time interval of 4 s
Explanation:
Using s = ut + 1/2at² where s = distance travelled by the ball, u = initial velocity of ball = 0 m/s (since it starts from rest), a = acceleration of the ball = 2.50 m/s² and t = time = 4 s.
Substituting the variables into the equation, we have
s = ut + 1/2at²
s = 0 × 4 s + 1/2 × 2.50 m/s² × (4 s)²
s = 0 + 1/2 × 2.50 m/s² × 16 s²
s = 1/2 × 40 m
s = 20 m
So, the ball travels a distance of 20 m in the time interval of 4 s.