Radon is a gas that is produced by the radioactive decay of naturally occurring heavy nuclei , such as thorium and uranium . Radon gas can be breathed into the lungs , where it can decay further . The nucleus of a radon atom has a mass of 222 u, where u is an atomic mass unit Assume that the nucleus is at rest when it decays into a polonium nucleus with mass 218 u and a helium nucleus with mass 4 u (called an alpha particle ), releasing 5.59 MeV of energy . The polonium and helium nucleus are emitted in exactly opposite directions . What are the kinetic energies of the polonium nucleus and the helium nucleus ? What we know

a displacement distance is size of displ

the higher the current the higher the mag field around it the higher the influence on the compass

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.

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