A semi-truck, travelling east at vt = 20 km/h, is struck head-on by a passenger car, mc = 1250 kg, traveling west at vc = 175 km/h. If the collision is perfectly inelastic, what is the mass of the semi-truck, if the two come to rest immediately after the collision?

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

double the distance = divide strength by 4

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2