(urgent 75 points)you are given two same party balloons (one filled with helium and the

second is empty and rolled), the scale, graduated mass of 100 grams, and

a pile of paper clips. show how you would:

• calculate the volume of the balloon (no ruler).

• how many balloons you would need to lift 126lbs person?

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Which model displays the change in a gas when the temperature of the gaseous system decreases?