A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a ...

[karlynnae]

A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a thermal conductivity of 1.3 W/(mK), separates a basement at 18C from the ground outside at 6C. How much heat flows through the wall in one hour?
 
  A)
 
  1.8 MJ
 
  B)
 
  1.8 kJ
 
  C)
 
  500 J
 
  D)
 
  5.0 MJ
 
  E)
 
  5.0 kJ

Question 2

A solid sphere is rolling without slipping along a horizontal surface with a speed of 4.50 m/s when it starts up a ramp that makes an angle of 25.0 with the horizontal.
 
  What is the speed of the sphere after it has rolled 3.00 m up the ramp?
  A)
 
  4.01 m/s
 
  B)
 
  8.02 m/s
 
  C)
 
  1.91 m/s
 
  D)
 
  2.16 m/s
 
  E)
 
  1.58 m/s

[asware1]

Answer to Question 1

A

Answer to Question 2

E

[karlynnae]

Thanks for the timely response, appreciate it

[Viet Thy]

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