Explanation:
Given:
Δx = -100
v = 10
a = 20
To find v₀, use a kinematic equation that's independent of time.
v² = v₀² + 2aΔx
(10)² = v₀² + 2(20)(-100)
100 = v₀² − 4000
v₀² = 4100
v₀ = ±64.0
As your teacher said, v₀ can't be +64.0. So v₀ = -64.0.
Next, to find time, use a kinematic equation that's independent of initial velocity.
Δx = vt − ½ at²
-100 = (10) t − ½ (20) t²
-100 = 10 t − 10 t²
-10 = t − t²
t² − t − 10 = 0
Solve with quadratic formula:
t = [ -(-1) ± √((-1)² − 4(1)(-10)) ] / 2(1)
t = (1 ± √41) / 2
t > 0, so:
t = (1 + √41) / 2
t ≈ 3.70
Answer:
barred spiral galaxy
Explanation:
There exist various forms of galaxies which include barred spiral, spiral, irregular and elliptical galaxies.
The galaxy we live in, the milky way galaxy i structured in the form of a spiral with bars located within it hence its a barred spiral galaxy. It is composed of six parts which includes the nucleus,a disk, spiral arms, central bulge, sphere and a halo.The components interact with each other.At the center of the milky way galaxy resides a massive black-hole called Sagittarius.
Answer:
The potential difference between the plates is 8 V.
Explanation:
Given that,
Area of plates = 0.40 m²
Charge 
Distance = 4.0 cm
We need to calculate the electric field
Using for formula of electric field
Where, q = charge
A = area
Put the value into the formula
We need to calculate the potential difference between the plates
Using formula of potential difference
Where, E = electric field
d = distance
Put the value into the formula
Hence, The potential difference between the plates is 8 V.
Answer:
c. The particle is moving in a positive direction, and its speed is decreasing.
