Awire with mass 50 g is stretched so that it’s ends are tied down at points 100 cm apart. the wire vibrates in its fundamental mode with frequency 60 hz and an amplitude of 0.5 cm at the antinodes. what is the tension in the wire?

2500 n
720 n
120 n
1250 n

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?