A vector has components Ax = 12.0 m and Ay = 5.00 m. What is the angle that vector makes with the x-axis?
A) 12.6
B) 22.6
C) 32.6
D) 6.6
E) 42.8
Question 2A charged particle moves and experiences no magnetic force. From this we can conclude that
A) the particle is moving at right angles to the magnetic field.
B) the particle is moving parallel to the magnetic field.
C) either no magnetic field exists or the particle is moving parallel to the field.
D) no magnetic field exists in that region of space.
E) the particle must be massive.
Question 3As the average surface temperature of the Earth rises, the Northern hemisphere of the Earth is warming more rapidly than the Southern hemisphere because
A) the Northern hemisphere contains more landmass which more readily absorbs solar radiation
B) during summer in the Northern hemisphere, the Earth is closer to the Sun
C) there is less ice in Arctic regions compared to the Antarctic regions so less radiation is reflected out into space
D) there are more clouds in the Southern hemisphere to reflect solar radiation out into space
Question 4The change in the frequency of a wave due to the motion of the source (or observer) is known as
A) the Bell effect.
B) the Mach effect.
C) the Doppler effect.
D) interference.
E) diffraction.
Question 5A radioactive isotope with an atomic number of 37 undergoes electron capture. What is the atomic number of the daughter nucleus?
A) 35
B) 34
C) 38
D) 36
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