Before organisms with nuclei evolved, life on earth consisted only of unicellular

A) eukaryotes.

B) fungi.

C) prokaryotes.

D) protists.

The momentum of blue whale with a mass of 146,000 kg and a top swimming speed of 24 km/hr is kg·m/s.

Where is most of a thermometer is liquid located

Explain how atmospheric carbon is incorporated into two oceanic sinks.

Which of the following colors are part of the visible spectrum? A. violet B. blue C. red D. all of these

Feature detectors are neurons that are turned on or off by specific features of visual stimuli like edges and movement. Where in the visual system are these feature detectors located?

A 25kg object moves from left to right at a speed of 30km/h. What net force is required to keep this object moving in a straight line at constant speed

Ganymede is one of the many moons of jupiter. it is nearly a sperical in shape. it is larger than the planet mercury and slightly smaller than the planet mars.

Which of the following statements about two carts rolling on a track and experiencing a completely inelastic collision is TRUE? a. The kinetic energy of the system is conserved to good approximation. b.

If element X has 17 protons, how many electrons does it have?

A 2.0-kilogram laboratory cart is sliding across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.