1. Velocity
2. Time
3. Idk
4. Idk
5. D. I think it may be A. but I think D.
The answer to the question is b because acid is a substance that tastes sour, reacts with metal and turns litmus paper blue
Answer:
1, 2 and 3
Explanation:
The most dense substance will settle at the bottom of the cup
Answer:
t = 0.319 s
Explanation:
With the sudden movement of the athlete a pulse is formed that takes time to move along the rope, the speed of the rope is given by
v = √T/λ
Linear density is
λ = m / L
λ = 4/20
λ = 0.2 kg / m
The tension in the rope is equal to the athlete's weight, suppose it has a mass of m = 80 kg
T = W = mg
T = 80 9.8
T = 784 N
The pulse rate is
v = √(784 / 0.2)
v = 62.6 m / s
The time it takes to reach the hook can be searched with kinematics
v = x / t
t = x / v
t = 20 / 62.6
t = 0.319 s
