How long ago did homo sapiens first appeared in the fossil record? Identify the era in which this occurred.

What has been done to make structures more seismic safe?

What did Wundt's pendulum experiment demonstrate? A) Hearing sounds can confuse people when asked what they saw. B) Watching a pendulum requires extreme focus. C) People need time to shift between two different stimuli.

Describe how your position changes as you jump over an object

Vectors are used to describe many physic concepts. Any vector is completely defined with just 2 properties. Which the following statements is true.

What is the significance of the discovery of exoplanets?

Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?

Which movies are longer than 2 hours?

A new object has been discovered in the solar system. In your own words, justify how the object can be proved to be a comet.

What is cosmic microwave background radiation?

Ocean water has a salinity of 35 parts per thousand. Fresh water has a salinity of less than 0.5 parts per thousand. What can you conclude from this information? A. Ocean water is rich in salt minerals. B.