Fred has a very detailed model of the solar system where each planet is made out of granite rock. since his little sister really liked the model, he spent two weeks in his dad's workshop building her a styrofoam copy. when he picked up the models to take them back inside the house, which physical property would he immediately notice upon picking them up?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which notation is used to represent an alpha particle? a. b. c. d.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water