Abox of mass 1 kg is hung from a spring scale. the reading on the spring scale is approximately 10n. what would be the reading on the spring scale if a box of mass 5 kg is hung from it? (assume acceleration due to gravity to be 10 m/s2.)
a) 5 n
b) 10 n
c) 50 n
d) 500 n

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.)

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good