< SSC JE 2018 || General Science || Important for All Branches || Physics Questions Capsule || Part 3

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RRB ALP CBT 2 | ENGG. Drawing Quiz 1

Tuesday, 28 November 2017

SSC JE 2018 || General Science || Important for All Branches || Physics Questions Capsule || Part 3

Scientific Instruments-

Which instrument is used to measure altitudes in aircrafts- Altimeter
The temperature of the sun is measured with- Pyrometer
Thermometer used to measure very low temperature- Cryometer
Instrument used to measure change in volume of substances- Dilatometer
Instrument used to measure force & velocity of wind- Anemometer

Which waves are used in sonography- Ultrasonic waves
Infrasonic Waves-  (0 to 20 Hz)
Audible waves –   (20 to 20,000 Hz)
Ultrasonic waves – (>20,000 Hz)

Velocity of wave = Frequency × Wavelength.

SONAR stands for Sound Navigation And Ranging.
The transmitter of a sonar produces pulses of ultrasonic sound waves of a frequency of about 50000 Hz. 
The size of atomic nucleus is- 10^-14 m
What is used as a moderator in nuclear reactor- Graphite
The temperature at which both the Fahrenheit and the centigrade scales have the same value-
  - 40°
C/5 = (F-32)/9

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