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The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.67 m and 1.05 m, respectively. The respective rotational speeds are 456 rev/min and 4,130 rev/min. Calculate the speeds of the tips of both rotors. main rotor tail rotor Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s Compare these speeds with the speed of sound, 343 m/s. vmain rotor / vsound = vtail rotor / vsound =
A box with a mass of 5 kg is lifted (without acceleration) through a height of 2 m to place it upon the shelf of a closet. What is the increase in potential energy of the box
A spring (k = 75 N/m) has an equilibrium length of 1.00m. if the mass is not attached to the spring, how far up the slope will the mass move before coming to a rest
An object of length 3.00 cm is inside a plastic block with index of refraction 1.40. find where is the object relative to its image
A thin film of oil (n = 1.12) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, What is the minimum thickness of the oil film
You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs
With the switch open the ammeter reads 1.00 A. What is the resistance of resistor R2 to an appropriate precision and what is the potential difference across R2 when the switch is open?
A transformer with a turns ratio (secondary/primary) of 1:14 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit.What is the voltage supplied to the recharger?
An object is 28.0 cm from the center of a silvered spherical glass Christmas tree ornament 6.50 cm in diameter. What are the position and magnification of its image? (Use the correct sign conventions.) position _______________cm from the surface imag..
a 3000 kg car passes over a bump in a road that follows an arc of circle of radius 40m. what force does the road exert
A 76-kg man is at rest on ice skates. A 0.24-kg ball is thrown to him. The ball is moving horizontally at 26 m/s just before the man catches it. How fast is the man moving just after he catches the ball
The cutoff wavelength for a metal is found to be 300. nm. Calculate the maximum velocity of the emitted electrons
The distance from Planet X to a nearby star is 12 light-years (a light-year is the distance light travels in a year) measured in the rest frame of Planet X. How long will the trip take according to a clock fixed on Planet X
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