Answer:
EN PAISES TERCERMUNDITASS COMO EL MIO NO ENSEÑAN ESTAS COSAS ._.
Explanation:
Answer:
2 s, -20 m/s
Explanation:
Given:
y₀ = 20 m
y = 0 m
v₀ = 0 m/s
a = -9.8 m/s²
Find: t and v
y = y₀ + v₀ t + ½ at²
0 = 20 + 0 + ½ (-9.8) t²
0 = 20 − 4.9 t²
t ≈ 2 s
v² = v₀² + 2a(y − y₀)
v² = 0 + 2(-9.8)(0 − 20)
v ≈ ±20 m/s
Since the rock is falling, v = -20 m/s.
There are many forces that make an object move.
· An Unbalanced force acting on an object
· Energy applied to an object.
Answer: 329.28 m/s
Explanation:
Given that:
Distance of sound = 823.2 m
Time taken for sound = 2.5 seconds
The speed of traveling sound = ?
Speed is obtained by dividing the distance travelled by the time taken for the travel.
Speed = Distance / time
Speed = 823.2m/2.5 seconds
Speed = 329.28 m/s
Thus, the sound traveling as fast as 329.28 m/s
The force will be doubled if direction of one current is reversed and doubled.
The force between two parallel currents I₁ and I₂ that are spaced apart by r is measured as the ratio F/L. If the currents are flowing in the same direction, the force is attracting; if not, it is repulsive.
With a distance of 4.00 cm between them, two parallel wires repel one another with a force of 2.00 × 10⁻⁴ N/m. One wire is carrying 5.00 A of current.
I₁ = 5 A
d = 4 cm
F = 2 × 10⁻⁴ N/m
We have, F/L = μ₀ I₁ I₂ / L
Now, we know the force is directly proportional to the product of the current, and the direction of one current is reversed and doubled.
The force of interaction would become attractive and its magnitude would double as a result of switching the directions of either of the currents and doubling their size.
Learn more about force here:
brainly.com/question/12970081
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