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A 50 cm long wire with a mass of 1.0 g and a tension of 440 N passes across the open end of a tube of air that is closed on the other end. The wire is fixed at both ends and then bowed in the middle to produce its fundamental frequency and generate a sound wave. The tube length is then adjusted until the fundamental frequency of the tube is heard. What is the length of the tube? You can use the velocity of sound as 340 m/s.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 9.42 liters of water? (1 liter is equivalent to 1.00 × 10-3 m3) (b) What is the net charge of all these electrons?
A player kicks a football, giving it an initial velocity of 12 m/s W, at an angle of 40 degrees up from the horizontal. A second player, standing 28 m west of the kicker, immediately starts running to meet the ball. With what velocity must the seond ..
You are 1.7m m tall and stand 3.5m m from a plane mirror that extends vertically upward from the floor. What is the minimum height the mirror must have for you to be able to see the top of the table in the mirror
The following charges are located inside a submarine: 15 micro Coulomb, -9 micro Coulomb, 25 micro Coulomb, and -31 micro Coulomb. obtain the net electric flux through the hull of the submarine
Precisely 1.10 after the speeder passes, the policeman steps on the accelerator. If the police car's acceleration is 2.10 m/s2, Explain how much time elapses after the police car is passed until it overtakes the speeder
a carnot engine whose low-temperature reservoir is at 17.7degc has an efficiency of 29.2. by how much should the
A 61.2-kg boy at rest on roller skates throws a 0.915-kg ball horizontally with a speed of 7.44 m/s. With what speed does the boy recoil
Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. What are the diameters of the disks
a bicycle tire of radius 0.33 m and mass 1.5 kg is rotating at 98.7 rads. what torque is necessary to stop the tire in
A laser used in a holography experiment has an average output power of 4.93 mW. Calculate the number of photons in each pulse
Consider an airless, non-rotating planet of mass M and radius R. Calculate the ratio h/R of the projectile's maximum height to the planet's radius
A window washer pulls herself upward using a pulley apparatus. If she increases the force by 15 percent, compute what will her acceleration be
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