Answer:
accleraion normal ski 0.0735 m/s², new ski 0.219 m/s²
Explanation:
This exercise should work with the one-dimensional kinetic equations, specifically with the equation
x = v₀ t + ½ a t²
When the skier is at the exit they are at rest, so their initial speed is zero
(v₀ = 0)
x = ½ a t²
Let's calculate the acceleration for normal skiing
a₁ = 2 x / t²
a₁ = 2 175/69²
a₁ = 0.0735 m/s²
a₁ = 7.35 10⁻² m/s²
Let's calculate the acceleration with the new plastic ski
a₂ = 2 x / t₂²
a₂ = 2 175/40²
a₂ = 0.219 m/s²
a₂= 2.19 10⁻¹ m/s²
Answer:
I think it is the last one.
Explanation:
I am not sure because i am stuck on this one, too.
Measuring the heat of chemical reactions or physical changes.
Answer:
heat resistant gloves
Explanation:
If beaker tongs are not within reach, you can use heat resistant gloves to handle a hot beaker.
The Heat resistant gloves is a protective equipment that offers protection to the hands against heat and flames. They are designed to give protection from burns and also from sparks when one comes in contact with extremely hot objects or temperatures in the workplace.
You get carpet burn and you kinda get mad because it hurts. xD