Question 211:

• JAMB 1982

The accurate measurement of the relative density of substances in powder or granular form can be done using a beam balance and a

A. Pipette
B. Burette
C. Measuring cylinder
D. Density
E. Bottle

Question 212:

• JAMB 1982

Which of the following statements is NOT true? Thermostats are used to control the temperature of

A. Pressure cookers
B. Laundry irons
C. Hot water storage tanks
D. Aquaria for tropical fish
E. Heated apartments

Question 213:

• JAMB 1982

250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC)

A. 39.5J/kg^oC
B. 50.4J/kg^oC
C. 127.6J/kg^oC
D. 154.6J/kg^oC
E. 173.4J/kg^oC

Question 214:

• JAMB 1982

An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is

A. 20cm
B. 45cm
C. 54cm
D. 63cm
E. 70cm

Question 215:

• JAMB 1982

The combination of sound waves with different frequencies is known as

A. Interference
B. Diffraction
C. Superposition
D. Forced vibration
E. Resonance