Answer:
80m<em>/</em><em>s</em>
Explanation:
Final velocity is given by 
v=u+at
when a motorcyclist starts from rest, initial velocity (u) =0
therefore 
v=0+4*20
v=80m/s
that's the answer 
 
        
             
        
        
        
Answer:
W= -2.5 (p₁*0.0012) joules
Explanation:
Given that p₀= initial pressure, p₁=final pressure, Vi= initial volume=0 and Vf=final volume= 6/5 liters where p₁=p₀ then
In adiabatic compression, work done by mixture during compression is
 W=  where f= final volume and i =initial volume, p=pressure
  where f= final volume and i =initial volume, p=pressure
p can be written as p=K/V^γ where K=p₀Vi^γ =p₁Vf^γ 
W= 
W= K/1-γ ( 1/Vf^γ-1 - 1/Vi^γ-1)
W=1/1-γ (p₁Vf-p₀Vi)
W= 1/1-1.40 (p₁*6/5 -p₀*0)   
W= -2.5 (p₁*6/5*0.001)   changing liters to m³
W= -2.5 (p₁*0.0012) joules
 
        
             
        
        
        
Answer:
It has to overcome earth's gravity and have enough fuel to land on the moon at a slow enough speed
 
        
             
        
        
        
Answer:
It is classified as a metal because of its high ductility, malleability, thermal and electrical conductivity and resistance to corrosion. Copper is a mineral used for our everyday use. It is limited and we have to use it wisely because it is not evenly distributed everywhere and also everyone needs it. Copper is element number 29 on the Periodic Table of Elements. It is also used it electronics and wiring.
hope this helped
 :)