Amicrophone is attaced to a spring that is suspended from
theceiling. directly below on the floor is a stationary 440
hzsource of sound. the microphone vibrates up and down insimple
harmonic motiono with a period of 2.0 s. the
differnce between the maximum and minimum sound frequenciesdetected
by the microphone is 2.1 hz. ignorign anyreflections of sound in
the room and using 343 m/s for the speed ofsound, determine the
amplitude of the simple harmonic motion.

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.