Mark brainliest answer

you inflate a balloon with helium. the balloon feels stiff. which properties of a gas best explain the observation?

a) the particles are moving quickly and are far apart.
b) the particles are closely packed and vibrate in place.
c) the particles slide past each other and are close together.
d) the particles are closely packed and are moving very quickly.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

when it gains or loses electrons

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

there are no contact forces mentioned on the list of choices that you've provided.