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A hollow log, open at one end, is struck with a stout stick. The hollow cavity of the log is 6 meters long, and the pressure waves that constitute sound travel at 342m/s. What are the frequencies of the resulting first four harmonics?
A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 10.9 m/s due north relative to the water. If the river is 362 m wide, explain how far downstream is the boat when it reaches the north shore?
What mass of water at 30.0°C must be allowed to come to thermal equilibrium with a 2.15-kg cube of aluminum initially at 1.50 × 102°C to lower the temperature of the aluminum to 77.0°C? compute the mass of the aluminum cup
An object weighs 35 N in the air. In water, it weighs 30 N. What is the buoyant force (in N) of the water on the object
Three identical 8.80kg masses are hung by three identical springs, as shown in the figure. Each spring has a force constant of 8.20kN/m and was 13.0cm long before any masses were attached to it. How long is each spring (bottom, middle, lower) when ha..
At a certain instant in time, in an electromagnetic wave, the electric field vector points to the north and the magnetic field vector points vertically downward.
The speed of object at displacement x = 20 m. The change in the momentum of the object at it is displaced from x = 12 to x = 20 m.
An inductor of L=0.7H and a charged capacitor C=5F with Q =20C are connected to each other. How much energy is stored in the capacitor initially? When the current in the circuit is ½ its maximum value, how much energy remains in the capacitor?
a mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.24 cm.a if the spring
Compute the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium. Making the same assumption, how many cells are there in a human?
A thin spherical shell of silver has an inner radius of 2.20 10-2 m when the temperature is 17° C. Find the change in the interior volume of the shell
a water droplet with a mass of 22.3 ng 1 ng 1 nanogram 1e-9 g is stationary in the air under the combined influence
What is the magnitude of the acceleration of the anvil. find the mass of the planet from this information.
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