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A wall with a thermal conductivity of 0.50W/m·K is maintained at 40.0°C. The heat transfer through the wall is 250.0W. The wall surface area is 1.50m2 and its thickness is 1.00cm. Determine the temperature at the other surface.
QUESTION 1
A wave out in the deep ocean has an amplitude of 1.51 m, a wavelength of 212 m and a period of 14.3 s
What is the speed of such a wave? (in ms-1 to 3 s.f)
what happens to the (1) resistance and (2) current flow through a conductor if:
b. conductivity increases
c. decrease in temperature
2 pts) A light wave is initially polarized in the +y direction and has intensity 1.0 W/m^2. It encounters a polarizer whose axis is 60 degrees counterclockwise from the +x axis. After the wave has emerged from the polarizer, i.
In which direction does its electric field point?
A. +x
B. +y
C. +z
D. 30° counterclockwise from +x
E. 60° counterclockwise from +x
ii. What is its intensity?
A. 0.25 W/m2
B. 0.50 W/m2
C. 0.75 W/m2
D. 0.87 W/m2
E. 1.0 W/m2
A uniform 3.0 kg disk of radius 30 cm is rotating around its central axis at an angular speed of 72 rad/s. At time t = 0, a man begins to slow it at a uniform rate until it stops at t = 20 s. (a) Find its angular acceleration. (b) By time t- 10 s, how much work had the man done? (c) For full 20 s, at what average rate did the man do work?
A spherical ball has a radius of 0.2 m and electric charge is 20uc in its center.Calculate the electric flux pass through the spherical ball.
A copper wire has a resistance of 15.0 at a temperature of 14 degrees * C . After a current passes through the windings, the resistance rose to 22.5 ohms. To what temperature was the wire heated?
Why did we choose to use a square wave with our function generator? What does it act like a substitute for? What happens as the frequency of the square wave increases?
A wall with a thermal conductivity of 0.50W/m·K is maintained at 40.0°C. The heat
transfer through the wall is 250.0W. The wall surface area is 1.50m2 and its thickness is 1.00cm.
Determine the temperature at the other surface.
You are trying to hold your 550 g physics books with your hand against a vertical wall. Using a force sensor, you know that the force you are applying is 10.0 N. Below the book on the floor you have placed a motion sensor that measures the position of the book over time. The position time graph for the book is given. Find FBD, Proper given, proper required, state laws being used, starting equations, rearranged equation, unit analysis, proper final answer
