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The drag on the hull of a ship depends in part on the height of the water waves produced by the hull. The potential energy associated with these waves therefore depends on the acceleration of gravity, g. Hence, we can state that the wave drag on the hull is D = f (p8, V8, c, g) where c is a length scale associated with the hull, say, the maximum width of the hull. Define the drag coefficient as CD = D/q8c2. Also, define a similarity parameter called the Froude number, Fr= V/vgc. Using Buckingham's pi theorem, prove that CD =/(Fr).
A person walks up a stalled 14 m long escalator in 81 s. When standing on the same escalator, now moving, the person is up in 48 s. How much time would it take that person to walk up the moving escalator?
Calculate the entropy change for the following system: One kilogram of 80 C aluminum is placed into 2L of 20 C water in a container with negligible heat capacity and adiabatic walls. The water and aluminum reach thermal equilibrium. Assume specific h..
A radio antenna broadcasts a 1.0 MHz radio wave with 30.0 kW of power. What is the electric field amplitude at this distance
A comet orbits the sun in a strongly elliptical orbit. The comet and star are far apart from other massive objects. what kind of energy does your system have
Classical Mechanics: Projectile Motion, A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.80 m/s at an angle of 21.0° below the horizontal. It strikes the ground 3.00 s later.
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneous breaks into two alpha particles, what is the force between the two alpha particles when they are 7.00 x 10^-15 m apart
Assume the car is moving at 72 km/hr when the brake pedal is applied. Assume that the radius of the wheel is 15 cm. What is the maximum power.
What is the charge on negative electrode. Find out the wavelength.
The wheel in the figure below has eight equally spaced spokes and a radius of 30 cm. It is mounted on a fixed axle and is spinning at 2 rev/s. You want to shoot a 23 cm long arrow parallel to this axle and through the wheel without hitting any of the..
A 950-kg satellite orbits the Earth at a constant altitude of 105-km. What is the change in the system's kinetic energy
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.19 g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0° with the vertical, as sho..
A block slides down a frictionless plane having an inclination of17.0°. If the block starts from rest at the top and the length of thisincline is 1.53 m, find the acceleration of the block.
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