Question 8 The figure below shows a ripple tank which is used to study the behavior of water waves. Water waves
are produced in the tank. The shadow of the waves is projected onto the screen below the tank. A clear
view of the screen is also shown to the right of the ripple tank. What is the approximate wavelength of
the waves as seen on the screen?
metre ruler
SCREEN
lamp
dipper dips in and out of the
water producing ripples
to signal generator
o cm
water
screen
90 cm
shadows cast by ripples
metre ruler
A. 10 cm
B. 11 cm
C. 98 cm
D. 720 cm
Justify your

the amount of current in the coil

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2