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Physics 1260 Exam study guide 2.0 with Questions and 100% Correct Answer

PHYS 1260 Exam 3 Conceptual Review Questions and Correct Answer

PHYS 1260 Exam ECU with Questions and 100% Correct Answers

A car moves around a level circular track at increasing speed. Which of the following statements is true? A) There is no work done on the car B) The car's acceleration is inward C) The car's PE is changing D) The car's acceleration not inward or tangent to its path - Answer D) The car's acceleration not inward or tangent to its path

The more we know about a particle's position, the less we know about its - Answer speed, momentum, and kinetic energy [all of these] When an electron de-excites from the third quantum level to the second, and then to the ground state, two photons are emitted. The sum of the emitted frequencies equals the frequency of the single photon that would be emitted if de-excitation were from the third to - Answer the ground state

Electrical forces can be attractive or repulsive but gravity is only repulsive. Why? - Answer No such thing as negative mass Electrostatic force is stronger than the gravitational force. How much stronger? - Answer 20 times stronger Positive - Answer test charge would be repelled from the positive source charge

Rays with the shortest wavelengths have the A) highest frequencies and energies. B) lowest frequencies and energies. C) lowest frequencies but highest energies. - Answer A) highest frequencies and energies. Explanation — From f = 1/T, we know that a short period T describes a wave with peaks or valleys close together (i.e., f high). Chapter 30: Nuclear Physics A certain radioactive isotope placed near a Geiger counter (a type of radiation detector) registers 120 counts per minute. If th...

) how frequently a magnet dips in and out of the coil - Answer The frequency of induced voltage in a wire coil depends on A) the frequency of a current producing it B) how frequently a magnet dips in and out of the coil C) the number of loops in the coil

An optical instrument is said to be ____ if it has reached a principal limit of resolution performance. - Answer diffraction-limited The ocular in a microscope behaves like a(n) - Answer magnifying glass Focal lengths that would be appropriate for the ocular of an astronomical telescope - Answer 2.5 cm, 5 cm

eclipses - Answer - solar eclipse = bc of the large size of the sun, the rays taper to provide an umbra (total eclipse) and a surrounding penumbra (partial eclipse) - lunar eclipse = the moon passes completely into the shadow of earth reflection - Answer - we say light is reflected when it is returned into the medium from which it came -> the process is *reflection* - when light illuminates a material, electrons in the atoms of the material move more energetically in response to the osc...