Which question can be used to identify a physical property of an element? a) Does a magnet attract the element?
b) Does rust form when the element is exposed to oxygen?
c) Do bubbles form when the element is mixed with an acid?
d) Does the element burn when held over a Bunsen burner flame?

Apackage of supplies is dropped from a plane, and one second later a second package is dropped. neglecting air resistance, the relative velocity of the 1st package viewed from the second will 56) a) increase. b) be constant. c) be zero. d) depend upon their weight. e) decrease

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?