Midterm Exam Review Question Preview (ID: 49239)
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Which of the following is NOT TRUE for an oscillating (swinging) pendulum?
a) The law involved is the law of conservation of energy.
b) Potential energies at the end points are the same.
c) Two forms of energy are involved - potential and kinetic energy.
d) The potential energy is the lowest at the end points and the kinetic energy is at the lowest at the bottom position
If a pendulum has 6 Joules of potential energy at its highest point, how many Joules of kinetic energy will it have at its lowest point?
a) 3 J
b) 0 J
c) 2 J
d) 6 J
Where does a bar magnet have the strongest magnetic force?
a) In the middle of the magnet, where north and south meet
b) a foot away from the magnet
c) at the north and south pole
d) at the north pole only
Which argument supports the Law of Conservation of Energy within a system?
a) Energy cannot be created.
b) Energy cannot be changed.
c) Energy cannot be created or destroyed.
d) Energy cannot be changed or destroyed.
You and your lab group have been asked to design an investigation to determine the effects of heat transfer between two different objects. Which of the following investigation designs explains the heat transfer when atoms directly touch?
a) Hands touching the handle of pan sitting on a lit Bunsen burner.
b) Boiling water, in a pan, in front of a lit Bunsen burner.
c) Boiling water, in a pan, sitting on a lit Bunsen burner.
d) Hands warming in front of a lit Bunsen burner.
Allison makes an electromagnet and switches on the circuit and brings some paper clips near the iron rod. The paper clips are attracted to the iron rod. Which of the following will cause the paper clips to fall off the iron rod?
a) increase the current flow through the circuit
b) switch on the circuit to start the current flow
c) increase the copper wiring around the iron rod
d) switch off the circuit to stop the electric current
What results when energy is transformed while juggling three bowling pins?
a) electrical energy
b) heat energy
c) mechanical energy
d) sound energy
A positively charged rod is brought near the LEFT side of a metal sphere. Which of the following accurately represents the charge distribution in the metal sphere
a) + --
b) -- +
c) + -- + --
d) + -- -- +
A student rubs a neutral balloon with a cloth on a cool, dry day. The balloon gains electrons. Which of the following is an accurate description of what occurred, and why?
a) The balloon gains a positive charge through conduction.
b) The balloon gains a negative charge through friction.
c) The balloon gains a negative charge through conduction.
d) The balloon gains a positive charge through friction.
You bring the charged portion of a balloon close to a classmate’s hair and watch as the hair sticks to the balloon. The teacher explains that this is due to the negative charge on the hair. What is the charge on the balloon?
a) negative
b) neutral
c) no charge
d) positive
Cassie noticed that when she placed a straw in a glass of water, the straw appeared to be broken and part of the straw in the water appear to be larger than the part that was not in the water. Which BEST explains Cassie's observations?
a) Cassie's observation is due to light refraction. The light rays are bent when they travel through the water and the glass.
b) Cassie's observation is due to light reflection. The light rays are bent when they travel through water and the glass.
c) Cassie's observation is due to light diffraction. The light rays are bent when they travel through water and the glass.
d) Cassie's observation is due to light scattering. The light rays are bent when they travel through water and the glass.
Bats use echolocation to find their prey. If the prey is moving away from the bat, the returning echo will have a lower pitch than the original sound, while the echo from the prey moving toward the bat will have a higher pitch. Which is true?
a) If the prey is moving toward the bat, the waves will be very spread out.
b) If the prey is moving toward the bat, the waves will be very tall.
c) If the prey is moving toward the bat, the waves will be very close together.
d) If the prey is moving toward the bat, the waves will not be very tall.
A new company is making security cameras. These security cameras will be different than other security cameras because instead of detecting motion, they will detect body heat. What type of electromagnetic wave will the camera detect?
a) gamma ray
b) infrared
c) microwave
d) radio wave
__________ lenses refract light rays in toward a central point. When this lens is held close to your eye, the image is magnified and right side up.
a) concave
b) convex
c) prismatic
d) refractive
Light travels slowest in high density media, faster in lower density media, and fastest in low density media. Which wave behavior is observed when light passes through media of different densities?
a) diffraction
b) reflection
c) refraction
d) interference
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