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A fan is rotating at a rate of 710 rpm. When the motor is turned off, the blades slow to rest in 3.5 s. What is the angular acceleration of the blades as they slow down?
A proton is propelled at 2 x 10^6 m/s perpendicular to a uniform magnetic field. If it experiences a magnetic force of 5.8 x 10^-11 N, find the strength of the megnetic field
Find out the magnitude of the wind velocity. Find the direction of the wind velocity.If the wind velocity is 39 due south, in what direction should the pilot set her course to travel due west? Use the same airspeed of 213 .
Suppose air, with a density of 1.29 kg/m3 is flowing into a Venturi meter. The narrow section of the pipe at point A has a diameter that is 1/3 of the diameter of the larger section of the pipe at point B. How fast is the air moving at point B
The potential on the axis of a uniformly charged disk at 5.5cm from the disk center is 140V ; the potential 12cm from the disk center is 110V. Find the disk radius in cm
a pendulum with a pendulum length of 1.25 m undergoing SHM of mass 250g just released from an angel of 7 to the vertical. determine the period and frequency of the motion
Four gram-moles of an ideal monatomic gas initially at temperature 300 K is compressed adiabatically from a volume of 1200 cm3 to a volume of 350 cm3. How much heat was transferred to the gas
A board of mass 20 kg and length 4 m is supported by two scales, one a t the left end of the board, and the other at 3 m from that end. What is the reading on the scale at the left end
q1. a force vector has a magnitude of 569 newtons and points at an angle 41o of below the positive x axis. what is a x
A substance has a melting point of 20° C and a heat of fusion of 2.9 × 104 J/kg. The boiling point is 150° C and the heat of vaporization is 5.8 × 104 J/kg at a pressure of one atmosphere. The specific heats for the solid, liquid, and gaseous phases ..
A 78 person sits on a 3.6 chair. Each leg of the chair makes contact with the floor in a circle that is 1.0 in diameter. Find the pressure exerted on the floor by each leg of the chair
Calculate the wavelengths of the first three members in the Paschen series. What part of the electromagnetic spectrum are these in?
When traveling past an observer with a relative speed v, a rocket is measured to be 9.10m long. What is the proper length of the rocket
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