A string has a mass per unit length of 3 x 10-3 g/cm and is attached to an electrically driven vibrator of frquency 100 cps. How long is the string if the number of segments produced is 2 under a tension of 0.3 kg?

Mass on a Spring: A 2.0-kg block on a frictionless table is connected to two springs whose opposite ends are fixed to walls, as shown in the figure. The springs have force constants (spring constants) k1 and k2. What is the oscillation angular frequency of the block if k1 = 7.6N/m and k2 = 5.0 N/m?

A. 2.5 rad/s B. 3.5 rad/s C. 0.40 rad/s D. 0.56 rad/s

Upon entering a medium in which the speed of light is 1.5 × 10^8 m/s from a medium in which the speed of light is 2 × 10^8 m/s, an oblique light ray will be _____________ the normal to the interface between the two media

a. bent away from b. bent toward c. travel along d. remain undeviated with respect to

For a certain ideal Carnot engine, the hot reservoir is 35°C higher than the cold reservoir. If this engine is to have an efficiency of 20%, what must be the temperature of the hot reservoir?

A) 70.0 K B) 140 K C) 175 K D) 210 K E) 245 K

An 8.000-mW laser beam emits a cylindrical beam of light 0.9000 mm in diameter. What is the rms value of the electric field in this beam?

A) 2176 N/C B) 1000 N/C C) 1088 N/C D) 4122 N/C E) 2000 N/C