Topsoil is

A, less fertile than the c horizon

B, rich in minerals and organic materials

C, found below the b horizon

D, very resistant to wind erosion

1. What is the bond angle between the hydrogen atoms in an ammonia (NH3) molecule? 2. What is the bond angle between the oxygen atoms in the carbon dioxide molecule? 3. What is the molecular geometry of a methane (CH4) molecule?

Protons are released from rest in a Van de Graaff accelerator. They start from a region where the potential is 7.15 MV then travel through a vacuum region to a region where the potential is zero.

Where can volcanoes form? A. Where there are cracks in the crust B. Along fault lines C. Where the crust is thin and can be ruptured D. All of the above

A car has a mass of 800 kg. It's weight is approximately?

Which statement correctly describes the earth's magnetic field? the geomagnetic south is consistent with a magnetic south. the geomagnetic north is similar to the south pole of a magnet.

During a football game, a receiver has just caught a pass and is standing still. Before he can move, a tackler, running at a velocity of 2.60 m/s, grabs and holds onto him so that they move off together with a velocity of 1.30 m/s.

What effect does an increase in temperature have on viscosity?

Aman tosses a jart upward with a velocity of 14.1 m/s a 60° angle

Describe accuracy, precision and best fit line.

Convert 255 cm to meters, millimeters, and kilometers