A 2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kN. What is the frequency of the fundamental mode of vibration of this wire?
A) 204 Hz
B) 102 Hz
C) 408 Hz
D) 510 Hz
E) 153 Hz
Answer: A
Physics & Space Science
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Collisions in Two Dimensions: A 900-kg car traveling 30.0° south of east at 12.0 m/s suddenly collides with a 750-kg car traveling north at 17.0 m/s. The cars stick together after colliding. What is the speed of the wreckage just after the collision?
A. 7.21 m/s B. 12.2 m/s C. 20.4 m/s D. 25.0 m/s E. 17.3 m/s
Physics & Space Science
Which of the following has the longest wavelength?
a) Visible light b) Gamma Ray c) Ultraviolet d) Radiowaves
Physics & Space Science
The capacitive reactance of a capacitor is very small at low frequencies
Indicate whether the statement is true or false
Physics & Space Science
A proton has a total energy of 2.5 × 10^?10 J. How fast is it moving? (mp = 1.67 × 10^?27 kg)
a. 0.90c b. 0.80c c. 0.70c d. 0.60c e. 0.40c
Physics & Space Science