The graph shows the force on an object as it moves a distance x. What is the work done by the force when the object moves from 2.0 m to 8.0 m?
A. 35 J
B. 48 J
C. 50 J
D. 52 J
E. 60 J
B. 48 J
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When observing a star that increases dramatically in brightness, if a plateau is observed in the light curve during the declining phase, the event is probably:
A) a nova. B) a type I supernova. C) a type II supernova. D) fusion in an accretion disk around a white dwarf. E) fusion in an accretion disk around a neutron star.
A hollow aluminum shaft (G 5 27 GPa, d2 5 96 mm, and d1 5 52 mm) has an angle of twist per unit length of 1.88/m due to torques T. The resulting maximum tensile stress in the shaft is approx-imately:
(A) 38 MPa
(B) 41 MPa
(C) 49 MPa
(A) 38 MPa
(B) 41 MPa
(C) 49 MPa
(D) 58 MPa
A simple circuit has a total resistance of 30 ?. If a 2.0-A current is maintained in this circuit, how much energy is dissipated in this circuit in 4.0 seconds?
A) 24 J B) 4.8 J C) 48 J D) 480 J E) 6.0 J
Pluto is visible to the naked eye on extremely dark nights
Indicate whether the statement is true or false