Cracking the SAT Physics Subject Test
Therefore, C As we derived back in Question 2 on this page, the maximum speed of the block is given by the equation vmax =. Th ...
decrease by a factor of. D The period of a spring–block simple harmonic oscillator is independent of the value of g. (Recall t ...
The net force toward the center of the bob’s circular path is FT − mg cosθmax. This must provide the centripetal force,. But sin ...
CHAPTER 9 DRILL D Electrostatic force obeys an inverse-square law: FE. Therefore, if r increases by a factor of 3, then FE decr ...
due to −Q points toward −Q. Since these vectors point in the same direction, the net electric field at P is (E to the right) + ( ...
CHAPTER 10 DRILL E A counterexample for I is provided by two equal positive charges; at the point midway between the charges, t ...
E =. Thus, both of these would be one-quarter as great at twice the distance. However, electric potential is just an inverse. Th ...
CHAPTER 11 DRILL A Let ρS denote the resistivity of silver and let AS denote the cross-sectional area of the silver wire. Then ...
single 3 Ω resistor, because. This 3 Ω resistor is in series with the top 3 Ω resistor, giving an equivalent resistance in the t ...
CHAPTER 12 DRILL D I is false: The magnetic field lines due to a current-carrying wire encircle the wire in closed loops. II is ...
proportional to r. So, at the distance from the wire, the magnetic field will be twice as strong. E The magnetic force provides ...
CHAPTER 13 DRILL E Since v is upward and B is out of the page, the direction of FB on the free electrons will be to the left, ...
CHAPTER 14 DRILL D From the equation λf = v, we find that 2. C The speed of a transverse traveling wave on a stretched rope is ...
A Wave Rule #2 states that when a wave travels from one medium into another medium the frequency remains the same. This elimina ...
A Since the car is traveling away from the stationary detector, the observed frequency will be lower than the source frequency. ...
CHAPTER 15 DRILL B From the equation λf = c, we find that D Since the fringe is bright, the waves must interfere constructively ...
Since the reflected and refracted beams are perpendicular to each other, we have θ 2 = 30°. Snell’s law then becomes ...
A Wave Rule #2 states that when a wave passes from one medium to another medium the frequency remains the same. The frequency i ...
Total internal reflection can happen only if the incident beam originates in the medium with the higher index of refraction and ...
Because si = 60 cm, the object distance, so, must be 240 cm. Therefore B A bi-concave lens is a diverging lens. Diverging lense ...
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