A puck with a mass m1 = 50 g moving at 1.0 m/s approaches a stationary puck with a mass m2 = 100 g on a frictionless air table,
and they undergo a sudden two-dimensional elastic collision. After the collision, both pucks have identical speeds, but travel in different directions. What is the angle between the original and final paths of puck with mass m1?
A) 30°
B) 60°
C) 90°
D) 120°
E) 150°
C
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Radioactivity Basics: When an unstable nucleus decays by emitting an alpha particle, the atomic number Z of the nucleus
A. increases by 4. B. increases by 2. C. decreases by 2. D. decreases by 4. E. remains unchanged.
The focal length of a concave mirror is 20 cm. What is its radius of curvature?
A) 10 cm B) 40 cm C) -40 cm D) 20 cm E) -20 cm
Coherent light of a single frequency passes through a double slit with a separation d, to produce a pattern on a screen as distance D from the slits. What would cause the separation between adjacent minima on the screen to increase?
A. increase the index of refraction of the medium in which the setup is immersed B. increase the separation d between the slits C. increase the distance D D. increase the frequency of the incident light
For glucose dissolving in water at 298 K, the diffusivity is 6.9 x 10^-10m^2/s. What do you expect the diffusivity of water in glucose to be?
What will be an ideal response?