Question description<\/p>\n
The helium atom has two neutrons and two protons in its nucleus, and it has two electrons outside its nucleus. Which force keeps a helium atom from disintegrating into two neutrons and two hydrogen atoms?A. FrictionB. Electromagnetic\u00a0C. Strong nuclear\u00a0D. GravityWhich of these is a contact force?A. Force of a magnet that attracts paper clipsB. Earth’s attraction of the moonC. Force of a bat on a baseball\u00a0D. Force that causes static cling when drying clothesWhich best describes friction in the context of Newton’s laws?\u00a0A. A kind of tape that holds things togetherB. A force that is always in the direction opposite to the accelerationC. An object’s resistance to being accelerated by a forceD. A force that opposes the relative motion of two objects in contact with and sliding past each otherWhat is the main topic of dynamic that is NOT addressed in kinematics?A. How forces affect motionB. How things actively change all the timeC. How position, displacement, velocity, and acceleration are relatedD. inertiaWhich statement is equivalent to Newton’s first law?A. The unit of force is the newtonB. For every action there is an equal and opposite reactionC. If no net force acts on an object, the motion of the object does not changeD. The force of an object is equal to the mass times its accelerationA small lab cart and one of larger mass collide and rebound off each other. Which of them has the greater average force on it during the collision?A. The small cart has greater force on itB. The large cart has greater force on itC. They both experience the same magnitude of the collision forceD. They both experience a force of zero<\/p>\n","protected":false},"excerpt":{"rendered":"
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