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1. What drag force acts on a 76-cm-diameter sphere towed 2 m below the surface of water at 20 m=s? 2. A 2.2-m-long hydrofoil with chord length 50 cm operates 40 cm below the water's surface with an angle of attack of 4-. For a speed of 15 m=s determine the drag and lift and decide if cavitation exists on the hydrofoil.
A man pushes a 50N box across a level floor at a constant speed of 2.0 m/s for 10 s. Find the average power output by the man
The ammonia molecule NH3 has a permanent electric dipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 x 10-30 C-m. find the electric potential in volts due to an ammonia molecule
Four identical metallic objects carry the following charges: +6.2 µC, +8.6 µC, -1.0 µC, and -2.0 µC. What is the final charge on each object
The electric charge of a proton is distributed over a volume. The distribution of the proton can be approximated by the exponential equation rho = e/(8*pi*b)exp(-r/b). r is the radial position inside the proton and b equals .23 * 10^-15 m. Find th..
A piece of copper wire is formed into a single circular loop of radius 12 cm. What is the average electrical energy dissipated in the resistance of the wire
A wheel of mass m = 16kg and radius r = 0:5m is connected to a motor that causes it to attain rotational speed of w = 20rads^-1 in 10s, What is the average torque applied to the wheel by the motor
Describe how to find moment of inertia. Provide equations allowing to find moment of inertia of a solid cylinder and of a cylindrical ring. State Newton's Second Law for rotational motion
An electron is accelerated from rest by an electric field. After the acceleration, the electron is injected into a uniform magnetic field of 1.27 x 10-3 T. Find the angle between the initial and final electron velocities
a boy goes to market with a average speed of 29 kmh.he returns back half the way he went with a average speed of 40
Interpretation of Distance-time Graph 1. Which car is ahead and by how much distance after 3 hours? 2. Which car stops moving after 3 hours?
How man electrons are present in a 1.5C charge? Determine the mass of the 1.5 C charge. 1e=9.1x10^-31kg. determine the resistivity constant if the wire has a cross sectional area of 2x10^-5 m^2
When a shower is turned on in a closed bathroom, the splashing of the water on the bare tub can fill the room's air with negatively charged ions and produce an electric field in the air as great as 1000 N/C, What are the volume charge density
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