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

Are There only two quantities of measurements? Vector n scalar?

The following reaction is an example of a base reacting with water: NH3 + H2O → H3O + NH4+ True False

Green light has a lower frequency than blue light. Which color of light has a longer wavelength?

Explain why it may make more sense to colonize on Venus, rather than Mars.

A small rock falling from the top of a 124-ft-tall building with an initial downward velocity of - 30 ft/sec is modeled by the equation h (t) = - 16t2 - 30t + 124, where t is the time in seconds.

A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?

What is the result of a mutation during replication A: the strands are different B: the strands are identical c: the strands are broken D: the strands are continuous

What is ___ heating of a liquid__ gas to liquid

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine