At 15cm, you measure a magnetic field of about 1.5 mT. If the magnetic field of a permanent magnet is dipole-like in this region, what is the closest magnetic field you would expect to measure at 30 cm from the magnet?a. 0.05 mTb. 3 mTc. 0.5 mTd. 0.7 mTe. 0.2 mTf. 0.38 mTg. 2.5 mT

In science and physics what is the standard unit of measure for speed?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

How can waves travel through ground?