A Some devices electromagnetic waves to find the location and speed of an object in these devices, the waves are emited and then relle off of the chject and returned back toward the device. By knowing the speed of the wave
and the time takes the wave to em to the device, the distance that the wave traveled can be calculated. Which type of wave would be safest to use in this type of device?
Gamma wawes would be the satest choice because they wavel the tastese.
Uvices would be treatest choice because they are easiest to visually detect
Radio waves would be the satest choice because they are the last damaging to organisms.
Xes would be the test choice because they are able to travel through many types of materials
D

mistakes are ok

wavelength divides in half and speed stays the same.

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.

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.