A student is standing 8 m from a roaring truck engine that is measured at 20 dB. The student moves 4 m closer to the engine. What is the measured sound intensity at the new distance? (dB) Can you also explain why? I need to know how to do it and I don't know how to.

Ascientific blank must be testable and capable of being proven false?

Which is the most accurate name for the covalent compound p2o3?

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.