Pls answer fast!
a girl throws a rock into a pond. a leaf floating ok the pond bobs up and down but does not change location on the ponds surface. why not?

a. the wave transports only energy, not matter.
b. the rock produced a stationary wave, not a moving wave
c. the rock was only a single disturbance, not a repeating motion.
d. the wave made by the rock is not strong enough to move the leaf

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

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?

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false