Answer:
v₂' = 19 m/s
Explanation:
given,
mass of car one = m₁ = 2000 Kg
mass of car two = m₂ = 1000 Kg
velocity of car one in right (v₁) = 10 m/s
velocity of car two in left (v₂)= 15 m/s
after collision
velocity(v₁') = 7 m/s
v₂' = ?
using conservation of momentum
m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'
m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'
2000 x 10 - 1000 x 15 = - 2000 x 7 + 1000 v₂'
1000 v₂' = 19000
v₂' = 19 m/s
Answer:
The correct answer is true.
The summit of Mount Everest has an average pressure around 30 kPa. ... A barometer also measures variations in atmospheric pressure. As altitude increases, the air becomes thinner, the density of air decreases, and the pressure of the air decreases as well.
A statement would be to the effect that plants use oxygen as part of photosynthesis
Quoting from the article itself:
"Since it is above Earth's atmosphere, it gives us clearer pictures of space than telescopes on Earth can."
