A futuristic design for a car is to have a large flywheel within the car to store kinetic energy
The flywheel is a solid uniform disk of mass 370 kg with a radius of 0.50 m, and it can rotate up to Assuming all of this stored kinetic energy could be transferred to the car to change its linear speed of, find the maximum attainable speed of the car.
221 m/s
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What is coherent light?
a. light of a single wavelength b. light that is all in phase c. light that is polarized in one direction d. none of the above
A cast iron pipe (L 5 12 m, weight density 5 72 kN/m3, d2 5 100 mm, and d1 5 75 mm) is lifted by a hoist. The lift points are 6 m apart. The maximum bending stress in the pipe is approximately:
(A) 28 MPa
(B) 33 MPa
(C) 47 MPa
(D) 59 MPa
Which of the following statements is true of type I supernovae?
A) They occur when a white dwarf has a lower mass than the Chandrasekhar limit. B) They appear to be produced by the collapse and explosion of a massive star. C) They are seen as a dimming star from Earth. D) They have no hydrogen lines in their spectra.
When the reflection of an object is seen in a plane mirror, the distance from the mirror to the image depends on
a. the wavelength of light used for viewing. b. the distance from the object to the mirror. c. the distance of both the observer and the object to the mirror. d. the size of the object.