A 0.75-kg sphere is released from rest and is moving 5.0 m/s after falling 2.0 m in a viscous medium. What is the change in mechanical energy caused by the force the viscous medium exerts on the sphere during this descent?
a. -6.1 J
b. -4.6 J
c. -5.3 J
d. -6.8 J
e. -2.7 J
C
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Fill in the blank(s) with correct word
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A. 1.8 rad/s2 B. 0.90 rad/s2 C. 5.7 rad/s2 D. 11 rad/s2
Mathilda collects photoelectric data in her physics laboratory. She measures a stopping potential of 5.82 volts for radiation of wavelength 100. nm, and 17.99 volts stops 50.0 nm
(a) What is the work function for the material in eV? (b) From her data one determines Planck's constant to be what?
There is no induced emf in a wire that is moving parallel to a magnetic field if the wire is moving in the direction of the magnetic field
Indicate whether the statement is true or false