Bluetooth is a technology that allows wireless devices to communicate data and information to each other. for example, a wireless pair of headphones can play music from a smart phone without a physical connection. however, the technology must be low energy enough not to cause damage to the people using the device. additionally, the wavelengths used in bluetooth technologies should not be visible. the waves associated with bluetooth technology are most similar to which wave type below?

a) x-rays
b) red light
c) radio waves
d) uv radiation

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.