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For the Betz limit, what is the ratio of flow areas for the stream tube encompassing the rotor at the rotor plane upstream and downstream?
An electron is confined to a box size of a small atom, 0.10 nm across. What's the uncertainty in the electron's momentum
A small block of mass m = 1.5 kg slides, without friction, along the loop-the-loop track shown. the block starts from the point P a distance h = 54 m above the bottom of the loop of radius R = 17.0 m. What is the kinetic energy of the mass at the ..
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles, What is the force between the two alpha particles when they are 3.40 x 10-15 m apart
A 1kg ball is falling to the floor. When it is 0.7m above thefloor, it's potential energy exactly equals its kinetic energy. What is its speed when it reaches the ground
Bill is flying an airplane with air speed 30.0 m/s. going south. Mike is on the ground and sees the plane traveling 25.0 m/s, 15 degrees east of south. What is the component of the wind's velocity to the north
this is modern physics not classical physics.an electron and a proton are each accelerated starting from rest through a
A 2 ?C negative charge is attracted to a large, well-anchored, positive charge. How much kinetic energy does the negatively charged object gain
The radius of the path of an object moving in a circle at constant speed is halved. If the speed remains the same, the centripetal force needed is
Pretend you are cleaning your garage but the big door is stuck. You can only move things through the smaller "people" door. So the cars and riding lawn mower have to stay in the garage.
A ball having a mass of 170 g strikes a wall with a speed of 5.0 m/s and rebounds with only 50% of its initial kinetic energy. find the speed of the ball immediately after rebounding
A uniform magnetic fields is applied perpendicular to the plane of a 60 turn circular coil with a radius of 6 centimeter and a resistance of 0.60 ohms. find the magnitude of the emf induced in the coil
A group of students determined that the following points were upon the best fit line for a graph of W2 vs. Determine the total mass of the system
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