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Each of the three helicopter rotor blades is 5.20 mlong and has a mass of 280 kg. The rotor is rotating at 250rpm. What is the rotational inertia of the rotor assemblyabout the axis of rotation? (Each blade can be considered to be athin rod.)
What is the kinetic energy of rotation?
an elastic collision between two bodies in which the collision is not head-on. Projectile particle m1 is an alpha particle and target m2 is an oxygen nucleus. Find the initial speed of the alpha particle
Two equal point charges repel each other with a force of 5.25 N. If they are separated by 4.0 cm, what is the magnitude of each charge
A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
An "energy bar" contains 18g of carbohydrates. If the energy bar was his only fuel, how far could a 68kg person walk at 5km/hr
A massless spring is hanging vertically and unloaded, from the ceiling. A mass is attached to the bottom end and released. How close to its final resting position is the mass after 1 second, given that it finally comes to rest 0.5 meters below the po..
The place you get your hair cut has two nearly parallel mirrors 8.00apart. As you sit in the chair, your head is 2.50 from the nearer mirror. Looking toward this mirror, you first see your face and then, farther away, the back of your head. (The m..
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.64 m, Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. calculate the moon\'s radial acceleration
q1. a scuba tank is filled with air to a pressure of 292 atm when the air temperature is 23 degrees celcius. a diver
at a concert you sit 12 m directly in front of one of the two speakers on the front of the stage. the other speaker is
An electron orbiting a hydrogen atom has an initial energy of -0.544 eV. The atom emits a photon, then absorbs a photon, ending up with an energy of -3.4 eV. What was the wavelength of the emitted photon?
A 5 kg block, measuring 10 cm per side, is held 50% submerged in water by a helium balloon. what is the diameter of the balloon
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