the water waves after striking the hurdle will:
reflect
refract
diffract
all a b and c
Which of the following devices can be used to produce both a transverse and longitudinal waves:
A string
A ripple tank
A helical spring (slinky)
A tuning fork
Human skin, in dry conditions, has a resistance of:
20,000 ohm
100,000 ohm
30,000 ohm
2000 ohm
Which is an example of a longitudinal wave:
Sound wave
Light wave
Radio wave
Water wave
Two uncharged objects a and b are rubbed against each other. When object b is placed near a negatively charged object c, the two objects repel each other. Which of these statements is true about object a:
Remains uncharged
Becomes positively charged
Becomes negatively charged
Unpredictable
