A 10  and 20  resistor are connected in series across a DC voltage source. The total resistance is:

A. 30 Ohms

B. 200 Ohms

C. 15 Ohms

D. None of the above

How many nanometers are 1 cm

How did kepler describe the planets ordits

A ball is whirled overhead at a velocity of 12 meters/second in a circular path whose radius is 2 meters.

List 9 endocrine glands, their location and function.

Describe three forces that are acting in the situation described below A factory worker carries a box of nails. His shoe slips on a patch of oil on the ground, and he drops the box. The box opens, and the nails all fall to the floor.

You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sofia, with mass 80.0 kg, is given a push and slides eastward. Elena, with mass 55.0 kg, is sent sliding northward.

Which practice fits the definition of conservation? using more of a mineral resource than needed not using a necessary mineral resource at all mining a mineral without regard to the surface soil and vegetation above it recycling cans that contain a

The word family implies that the elements in a family have like properties. What property do the elements of the noble gas family all share?

What is the energy of an object because of its potential and kinetic energies? A.) chemical energy B.) electrical energy C.) nuclear energy D.) mechanical energy

If the volume of a hot air balloon remains constant, what happens as the temperature of the air inside the balloon increases?