Why do biologists use classification?

A boat leaves a dock at 7:00 pm and travels due south at a speed of 20 km/h. another boat has been heading due east at 15 km/h and reaches the same dock at 8:00 pm.

Which type of friction keeps a pile of rocks from falling apart?

Why shouldn't the US government cut the space exploration budget? What are the advantages of exploring space?

A rocket, launched from rest, steadily increases speed to 33m/s over a 3.6s interval before exhausting all the fuel. The rocket continues upward but slows steadily to a stop 2.8s after running out of fuel.

Energy that is stored is kinetic energy

As light reflects off a mirror the angle between the incident ray and reflected ray of light is 50°. What is the angle of reflection?

In what part of the earth does convection occur?

13.00 cm + 2.56 mm + 0.0047 = cm? Solve problem with correct number of significant digits

What condition is necessary for the sustained flow of water in a pipe?

Are the days with the longest daylight always in the summer? Are the days with the shortest daylight always in the winter? Explain.