Carbon dioxide concentrations over the past 400,000 years Today
1
400
350
300
w
250
CO, concentration (ppm)
ruhan
200
150
100
50
0
400,000 BCE
300,000 BCE
200,000 BCE
100,000 BCE
Year
Complete the sentence.
Before the last century, the highest carbon dioxide concentration occurred roughly
325,000 years ago. The atmospheric concentration of carbon dioxide today is about
ppm higher than it was at that time.
50
100
150
200

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?

How to calculate voltage drop in a series circuit

The energy produced as a result of this flow of electrons from atom to atom is called