### How far away is the reflecting surface

Assignment Help Physics
##### Reference no: EM1310140

Q1. A stationary railroad whistle is sounded. An echo is heard 5.00 seconds later by train's engineer. If the speed of sound is 344 m/s, how far away is the reflecting surface?

Q2. The light ray below makes an angle of = 32.10 with the normal line at the boundary of linseed oil and water. Conclude angles 1 and 2. Note that n = 1.48 for linseed oil.

Q3. A 3.00-g copper penny at 25.0 C drops 50.0 m to the ground. (a) If 60 percent of the initial potential energy of the coin earth system goes increasing internal energy of the coin determine the coin's final temperature (b) does the result depends on mass of the coin?

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