5 A \machine produces compression waves in a spring that is 120 cm long by pulsing twice every second. The back and forth moveme
nt of the pulse creates compressed sections of the spring that are 30 cm apart and travel toward the other end of the spring. Which property of the wave does the value of two per second describe? A. wavelength B. intensity C. frequency D. amplitude
The machine produces compression waves in a spring that is 120cm long and it pulse twice every seconds. The property the wave exhibits by exhibiting the value of two per second is the Frequency.
Amplitude of a a wave is the maximum displacement from the equilibrium position. The amplitude of an object is equal to one half the path of the vibration path. The amplitude of a wave is proportional to the amplitude of the source. Amplitude measures how big a wave is . Amplitude of a wave usually look at the energy of a wave so it is not the amplitude .
The frequency of a wave gives the number of wave that passed fixed point at a given time.
The correct answer is C) frequency. In fact, the frequency is the number of wave crests (or pulses) per seconds. In our problem, the machine that produces the wave pulses two times per second, so this is exactly the frequency of the compression wave.
-5 W is the heat flows through the slab in one day
Explanation:
The heat transferred is directly proportional to the area of the material and the temperature differences in the body, whereas the heat transfer is inversely proportional to the length of the material
The equation can be written as where Q is the heat transfer, k is the thermal conductivity of the material, A is the area of the material and T is the difference in the temperature and the l is the length of the material.
Given that, A= 100 , l= 2 cm, k = 0.1 J/S. m. c and T= 100 degree Celsius
Substitute these values in the equation, you will get Q= -5 W
where Q is the heat transfer, k is the thermal conductivity of the material, A is the area of the material and T is the difference in the temperature and the l is the length of the material.
, l= 2 cm, k = 0.1 J/S. m. c and T= 100 degree Celsius