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The diameters of the main rotor and tail rotor of a single-engine helicopter are 14.4 m and 2.14 m, respectively. The respective rotational speeds are 450 rev/min and 4110 rev/min.
What is the speed of the tip of the large rotor? Give answer as a fraction of the speed of sound, vsound=343 m/s.
What is the speed of the tip of the small rotor? Give answer as a fraction of the speed of sound, vsound=343 m/s.
A 10 kg box is on the flatbed of a truck that is accelerating along a straight horizontal road. What is the max acceleration the truck can reach without the box falling
A .5kg mass attached to the end of a string swings in a vertical circle (radius =2m), What is the magnitude of the force of the string on the mass at this position
Given the initial velocity V1=2i+1j m/s of a moving object. It is subject to the acceleration A=1i+2j m/s^2, What is the object's final speed
A tennis ball is struck at the base line of the court, 12.5 m from the net. How far beyond the net will the ball hit the ground
You have a small electromagnet that consumes 320 W from a residential circuit delivering 115 V at 50.0 Hz. What is the internal resistance of the electromagnet
Gillian buys a pendulum clock at a discount store and discovers when she gets it home that it loses minutes each day.
A snowboarder starts from rest rides 30.31m down a snow covered slope that makes an angle of 34.19 degrees with the horizontal, How far will she travel along the flat snow
When ultraviolet light with a wavelength of 254 nm falls upon a clean metal surface, What is the photoelectric threshold wavelength for this metal
What will be the total horizontal distance traveled by the ball? What is the velocity of the ball (magnitude and direction) the instant before it hits the ground? That is what is its i-component? What is its j-component?
The initial velocity of a 2.28 kg block sliding down a frictionless inclined plane is found to be 1.11 m/s, What is the angle of the plane with respect to the horizontal
Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of 15.0 hours. Calculate the mass of the remaining sodium-24
A machine that makes transformers can only wind the coils with a single specific number density. what is length of the output coil
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