How long have humans been migrating?

А

2,000 years

about 200,000 years

about 60,000 years

D

1,000 years

What temperature has the same value in both the fahrenheit and kelvin scales?

The momentum of an ostrich is calculated to be 5,400 kg*km / hr Its mass is known to be 120 kg. Was the ostrich moving or standing still?

Why don't animal cells need chloroplasts? A) Animals do not make their own food. B) Animal cells make their own chlorophyll. C) Animal cells collect sunlight another way. D) Animals use photosynthesis to make their own food.

Suppose we have no idea what the voltages of our batteries are. What must these voltages be if a 100 amp current? ows uniformly across all three loops of the circuit above?

A thermodynamic system undergoes a process in which its internal energy decreases by 500 joules. At the same time, 220 joules of work is done on the system. What is the amount of heat transferred to or from the system? 280 joules

Most of the Earth's volcanoes occuWhen fossils or minerals form, certain unstable elements are sometimes locked into them.

a man is standing on the edge of a 20.0m high cliff. he throws a rock vertically with an initial velocity of 10.0m/s. how high does the rock go?

The slope of a velocity time graph over any interval of time gives the during that interval

if light travels in a vacuum at 3.00 x 10^8m/s and its frequency is 7.44 x 10^7 what is its wavelength

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?