A bimetallic strip is formed from two materials that have different
a. coefficients of linear expansion.
b. heat capacities.
c. calories.
d. phase transitions.
e. relative humidities.
a
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Snell's Law: A light ray in glass arrives at the glass-water interface at an angle of ? = 48° with the normal. The refracted ray in water makes an angle ? = 61° with the normal, as shown in the figure. The index of refraction of water is 1.33. The angle of incidence is now changed to ? = 25°. What is the new angle of refraction ? in the water?
A. 30° B. 56° C. 54° D. 60° E. 62°
The torque required to turn the crank on an ice cream maker is 4.50 Nm. How much work does it take to turn the crank through 300 full turns?
A) 4240 J B) 8480 J C) 2120 J D) 1350 J E) 2700 J
An electron moves with a speed of 3.0 × 104 m/s perpendicular to a uniform magnetic field of 0.40 T. What is the magnitude of the magnetic force exerted on the electron? (e = 1.60 × 10-19 C)
A) 4.8 × 10-14 N B) 1.9 × 10-15 N C) 5 × 10-20 N D) 2.2 × 10-24 N E) 0 N
When two strings of equal length on a guitar are played, two different pitches are heard. Comparing the waves on the lower pitch string to the higher, the waves on the higher pitch string have
A. a shorter wavelength. B. a larger period. C. a larger amplitude. D. a higher speed.