When a car goes around a curve at twice the speed, the centripetal force on the car doubles
Indicate whether the statement is true or false
F
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A bullet of mass 0.010 kg and speed of 200 m/s is brought to rest in a wooden block after penetrating a distance of 0.10 m. This process takes 0.02 second. The magnitude of the impulse delivered to the bullet by the block during this time is
A. 0.98 N. B. 2.0 Ns. C. 1.0 Ns. D. zero. E. 4.0 Ns.
When a vapor condenses
A) the temperature of the substance increases. B) the temperature of the substance decreases. C) heat energy leaves the substance. D) heat energy enters the substance.
Emission nebulae are also called ____ because they are composed of ionized hydrogen
a. HI regions b. HII regions c. Bok globules d. HeI regions e. reflection nebulae
A negatively-charged particle is slowly moving as it enters a region that has a constant magnetic field. If the velocity of the particle is initially perpendicular to the magnetic field, what will be the subsequent motion of the particle?
a) It will follow a helical path around the magnetic field lines. b) It will follow a circular path in the plane perpendicular to the magnetic field lines. c) It will follow a straight line path in the same direction as it was initially traveling. d) It will follow a circular path in a plane parallel to the magnetic field lines. e) It is impossible to predict the path the particle will follow.