An atom has a negative charge. which of the following must have occurred?

a)it lost a neutron.
b)it lost an electron.
c)it gained a proton.
d)it gained an electron.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

How does climate change cause the ocean's thermohaline current to slow down?