Which one of the following fertilizers contains a high percentage of nitrogen?
A. Urea
B. Ammonium nitrate
C. Calcium nitrate Ammonium
D. None of these
Answer
Correct Answer: A. Urea
When the source is moving towards the observer at rest the apparent frequency will:
A. Increased
B. Decreased
C. Both of above
D. None of these
Answer
Correct Answer: A. Increased
Bats navigate and find food by:
A. Eco-sounding
B. Eco-location
C. Acoustical echo
D. None of these
Answer
Correct Answer: B. Eco-location
If the stars are moving away from the Earth show a:
A. Redshift
B. Blueshift
C. Greenshift
D. None of these
Answer
Correct Answer: A. Redshift
If the stars are moving towards the earth show a:
A. Redshift
B. Blueshift
C. Yellowshift
D. None of these
Answer
Correct Answer: B. Blueshift
Doppler affect can be used to calculate the speeds of:
A. Planets
B. Distant stars
C. Galaxies
D. All of these
Answer
Correct Answer: B. Distant stars
The military applications of Doppler’s effect are:
A. Location of submarines
B. Control of anti-submarine weapons
C. Depth measurement of sea
D. All of these
Answer
Correct Answer: D. All of these
Sonar is the name of technique or detecting the presence of objects under water by:
A. Eco-ranging
B. Eco-sounding
C. Eco-acoustical
D. All of these
Answer
Answer: D. All of these
In Hook’s law, K is the spring constant depending on the:
A. Dimensions of spring
B. Material of spring
C. Applied force
D. All of these
Answer
Correct Answer: B. Material of spring
Hook’s law is defined as:
A. F and X are direct proportional
B. F and X are inverse proportional
C. F and X has no relation
D. None of these
Answer
Correct Answer: A. F and X are direct proportional