Answer:
The answer to your question is letter D.
Explanation:
In physics, mechanical work is the energy transferred by a force and its formula is Work = Force x distance.
Data given
Force = 90 N
Distance = 50 m
Work = ?
Substitution
Work = 90 N x 50 m
Simplification and result
Work = 4500 Nm = 4500 J
The answer is around 7.
As the acid and the base are of equal strength, they neutralize each other and the resulting solution is neutral (pH≈7).
Hope this helps you!
The velocity of the tennis racket after the collision 14.966 m/s.
Step-by-step explanation:
An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same.
let the following:
m₁ = mass of tennis racket = 0.311 kg
m₂ = mass of the ball = 0.057 kg
u₁ = velocity of tennis racket before collision = 30.3 m/s
u₂ = velocity of the ball before collision = -19.2 m/s
v₁ = velocity of tennis racket after collision
v₂ = velocity of the ball after collision
Right (+) , Left (-)
v₁ = [ u₁ * (m₁ - m₂) + u₂ * 2m₂ ]/ (m₁ + m₂)
= ( 30.3 * (0.311 - 0.057) - 19.2 * 2 * 0.057 ) / ( 0.311 + 0.057)
= 14.966 m/s.
So, the velocity of the tennis racket after the collision 14.966 m/s.
That's tin
d = m/v
42.5/ 5.8
which comes around 7.3 g/ml and matches with the density of the tin metal