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A 32.0 kilogram wheel, basically a thin hoop with radius 1.39 meter, is rotating at 280 rev/min. It must be brought to a stop in 15.0 second.
(a) Calculate how much work must be done to stop it?
J
(b) Determine what is the required average power?
W
Steam enters a compressor at p1= 6 bar, T1= 300 oC and exits at p2= 10 bar. The work on the system is measured as 200 kJ per kg of water vapor flowing. Determine the isentropic turbine efficiency.
State clearly the difference (a) between electric potential and electric field, (b) between electric potential and electric potential energy.
During a thunderstorm, winds with a speed of 49.4 m/s blow across a flat roof with an area of 751 m2
Fraunhofar double slit diffraction pattern is observed onthe focal plane of a lens of focal length 0.5m;wavelength ofincident light used is 500nm; Find the distance between their centres
A speedboat starts from rest and accelerates at +2.15m/s2 for 8.35 s. At the end of this time, the boatcontinues for an additional 8.62 s with an acceleration of +0.629m/s2. Following this, the boat accelerates at -0.968m/s2 for 8.87 s.
find the speed and direction of a proton passing through the origin and where the magnetic fields are: B1=1.0x10^-13 (j hat) T at (x,y,z)= (1,0,0) in mm, B2= -1x10^-13 (i hat) at (0,1,0) in mm
The driver of one car sounds a 365 Hz frequency horn and the driver of the other car hears a frequency of 392 Hz, Determine the speed of both cars
Light from the sun arrives at the earth, an average of 1.50×1011 m away, at the rate of 1.40×103 W/m2, for an area perpendicular to the direction of the light. What is the power output of the sun
A bullet is fired through a board 10.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. The initial speed of the bullet is 400 m/s and it emerges from the other side of the board with a speed of 30..
A spaceship of mass 1.90×10^6 kg is cruising at a speed of 4.50×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
Small rockets are used to make small adjustments in the speed of satellites. One such rocket has a thrust of 53 N. If it is fired to change the velocity of a(n) 66000 kg space craft by 99 cm/s, how long should it be fired? Answer in units of s.
A moth at about eye level is 11 cm in front of a plane mirror; you are behind the moth, 25 cm from the mirror. What is the distance between your eyes
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