What expresses a scalar quanitity?
a cat walks 5 meter in a garden.
a car move 40 m/s to the northeast
a plane flies to an airport located 350 meters to the south.
a person goes on a 3-kilometer jog from home to the store.

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather