You inflate a balloons with helium the balloons feel stiff, which properties of a gas best explains this observation

the particles are moving quickly and far apart

the particles are closley packed and vibrate in place

the particles slide past each other and are close together

the particles are closley packed and are moving very quickly

The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

Which of the following is an example of units for speed