Why do comets have tails?

A distinct layer within a soil profile is called a/an

Tennis balls cost $7 for a can of 3 he gives the cashiet $40 for the balls and receives$12 in change how many balls did steve buy?

At a certain harbor, the tides cause the ocean surface to rise and fall a distance d (from highest level to lowest level) in simple harmonic motion, with a period of 12.4 h. how long does it take for the water to fall a distance 0.

Suppose that the resistance between the walls of a biological cell is 3.9 * 109 Ω. (a) What is the current when the potential difference between the walls is 84 mV? (b) If the current is composed of Na + ions (q = + e), how many such ions flow in 0.

What is the velocity of an object with a kinetic energy of 800 J and a mass of 12 kg?

What is the general defination of parallax?

Change in speed over a given period of time is

A car takes 15 minutes to travel along a road that is 20 km long. What is the average speed of the car? A. 75 km/h B. 5.0 km/h C. 80 km/h D. 300 km/h

A 4.2 cm diameter circular loop of wire is in a 1.14 T magnetic field. The loop is removed from the field in 0.18 s. Assume that the loop is perpendicular to the magnetic field. What is the average induced emf?

When an ocean plate converges with another plate, what is created on the seafloor at the line of convergence?