The distance between 4 nodes (3 sections, 2 sections=a wavelength) is 15.0 cm. The frequency of the source is 10.0 Hz. What is the speed of the
waves in cm/s?
A) O 75.0 cm/s
B). 1.50 x 10^2 cm/s
C) 2.00 x 10^2 cm/s
D) 9.00 x 10 cm/s
E) 1.00 x 10^2 cm/s

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by

the ima (higher than 1m) will be greater than the ima with the height of 1m.