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Q. The length of a string is 298cm. It is held ?xed at each end. The string vibrates in four sections; i.e., the string has four antinodes, and the string vibrates at 110 Hz.
Find out the wavelength.
Q. A total of 26 bright and 26 dark Newton's rings (not counting dark spot at the center) are observed when 540 light falls normally on a planoconvex lens resting on a flat glass surface.How much thicker is the center than edges?
A 20 kg block is stacked on top of the 20 kg block. Both blocks are glued together. What is the magnitude F of force, acting horizontally on the two blocks, that is required to make the two blocks start to move.
If a metal wire carries a current of 23.0 mA, how long does it take for 12.0×1020 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10-19 C.
A 0.20 {rm kg} rock is thrown vertically upward from the top of a cliff that is 31.0 {rm m} high. While it hits the ground at the base of the cliff, the rock has the speed of 31 {rm m/s}. Assume that air resistance can be ignored; find the initial sp..
A truck travels beneath an airplane that is moving 190 km/h at an angle of 26? to the ground.
A flight attendant pulls her 65N flight bag a distance of 388m along a level airport floor at a constant velocity. The force she exerts is 38 N at an angle of 51° above horizontal.
A fun-loving 11.4 {rm kg} otter slides up a hill and then back down to the same place. If she starts up at 5.75 {rm m/s} and returns at 3.75 {rm m/s}, how much mechanical energy did she lose on the hill.
A person walks 21° north of east for 3.30km. How far would another person walk due north and due east to arrive at the identical location.
What is the kinetic energy of an ideal projectile of mass 15.3 kg at an apex (highest point) of its trajectory, if it was launched with an initial speed of 42.5 m/s and an initial angle of 41.5° respecting the horizontal.
A hockey stick is swung with the average angular acceleration of 1.5 rad/s2. What is the angular velocity of the stick as it strikes the ball at the end of 0.8 second swing.
W hat is the downward acceleration of the blue spool
The ball is 21.9 m from the goal post. The ball is kicked with an initial velocity of 19.8 m/s at an angle θ above ground. Between what two angles, θ1 and θ2, will the ball clear the 2.74m high crossbar.
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
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