Answer:
0.02 s
160 m/s
Explanation:
Given:
Δx = 1.6 m
v₀ = 0 m/s
a = 8000 m/s²
A) Find t.
Δx = v₀ t + ½ at²
1.6 m = (0 m/s) t + ½ (8000 m/s²) t²
t = 0.02 s
B) Find v.
v² = v₀² + 2aΔx
v² = (0 m/s)² + 2 (8000 m/s²) (1.6 m)
v = 160 m/s
The symbol "E3" represents the energy of electrons in the third energy level.
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Answer: Three forces act significantly on a freely floating helium-
filled balloon: gravity, air resistance (or drag force), and a
buoyant force.
Explanation:
The air pressure on the bottom of the balloon is slightly higher than the air pressure on the top of the balloon (because of the altitude difference). This difference gives rise to the bouyant force. This force competes with gravity as the two main forces acting on the balloon. Every time your feet hit the ground when you are running, the ground hits your feet with an equal and opposite force. Newton’s third law explains how balloons and rocket engines work. When the neck of an inflated balloon is released, the stretched rubber material pushes against the air in the balloon. The air rushes out of the neck of the balloon.
Answer: Masses of the two objects added together
Explanation:
mass of first player = 82 kg
speed of first player = 4.1 m/s (towards North)
mass of second player = 76 kg
speed of second player = 3.4 m/s (towards East)
now the two players will collide and stick together so here since there is no external force on the system of two players so we will say momentum of system of players will remain conserved
So here we will have
now after collision they both move together with same speed so we will have
so the magnitude of the velocity after they collide is given as
direction of motion is given as
so they both will move 52.4 degree North of East after collision
