Compared to orbital velocity, escape velocity is about:
A) the same.
B) 70% less.
C) 40% more.
D) twice as large.
E) four times greater.
C
You might also like to view...
Aluminum alloys must be welded in an inert atmosphere because of the formation of aluminum _________if welding is performed in air.
Fill in the blank(s) with the appropriate word(s).
A particle (q = 5.0 nC, m = 3.0 ?g) moves in a region where the magnetic field has components Bx = 2.0 mT, By = 3.0 mT, and Bz = ?4.0 mT. At an instant when the speed of the particle is 5.0 km/s and the direction of its velocity is 120° relative to the magnetic field, what is the magnitude of the acceleration of the particle?
A. 33 m/s2 B. 17 m/s2 C. 39 m/s2 D. 25 m/s2 E. 45 m/s2
After a supernova event occurring in a high-mass star, what is left behind?
A) always a white dwarf B) always a black hole C) always a neutron star D) either a white dwarf or a neutron star E) either a neutron star or a black hole
A coaxial cable has an inner cylindrical conductor surrounded by cylindrical insulation and an outer cylindrical conducting shell. The outer shell carries the same current but in the opposite direction from that in the inner conductor as shown. If the coaxial cable sits in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is
a.
a net force to the left.
b.
a net force to the right.
c.
a net force upwards.
d.
no net force but a slight shift of the inner conductor to the left and the outer conductor to the right.
e.
no net force but a slight shift of the inner conductor to the right and the outer conductor to the left.