The electric potential at x = 3.00 m is 120 V, and the electric potential at x = 5.00 m is 190 V. What is the x component of the electric field in this region, assuming the field is uniform?
1.140 N/C
2.-140 N/C
3.35.0 N/C
4.-35.0 N/C
5.75.0 N/C
4
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Increasing the mass m of a mass-and-spring system causes what kind of change in the resonant frequency of the system? (Assume no change in the system's spring constant k.)
A) The frequency increases. B) The frequency decreases. C) There is no change in the frequency. D) The frequency increases if the ratio k/m is greater than or equal to 1. E) The frequency decreases if the ratio k/m is less than 1.
A 5.0-g particle moving 60 m/s collides with a 2.0-g particle initially at rest. After the collision each of the particles has a velocity that is directed 30° from the original direction of motion of the 5.0-g particle. What is the speed of the 2.0-g particle after the collision?
a. 72 m/s b. 87 m/s c. 79 m/s d. 94 m/s e. 67 m/s
The bond between carbon atoms in the molecule ethane, H3C—CH3 is referred to as
A) a triple bond B) an ionic bond C) a single bond D) a double bond
What is an accretion disk, and what are its characteristics? Select the true statements regarding accretion disks.
Choose one or more: A. Conservation of angular momentum leads a cloud to form a disk rather than collapse entirely. B. An accretion disk forms because there is nothing to stop the collapse of an interstellar cloud toward its axis of rotation. C. The shape and motion of the accretion disk are the reason that the subsequently formed planets all orbit in or near the equatorial plane of the star. D. Most of the material in an accretion disk that does not end up in the protostar is available to form its planets. E. An accretion disk's radius is typically hundreds of AU.