Lisa was choosing between three alternatives: working on her job that pays her $60; writing a term paper which she values at $40; or going out with a friend, which she values at $80. The opportunity cost of going out with her friend is

What are the differences between a magnetic and gravitational interaction

A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be canceled. Suppose the experiment is done inside a solenoid of diameter 1.0 m, length 3.0 m, with a total of 5000 turns of wire.

A negative slope on the velocity vs. time graph indicates that the object is not accelerating A. True B. False

An iron anchor of density 7850.00 kg/m3 appears 183 N lighter in water than in air. a. What is the volume of the anchor? b. How much does it weigh in the air?

All of the earth's life and weather exists within the stratosphere. a. True b. False

Which of these rocks are formed by volcanic activity? select the two correct answers. a. marble b. basalt c. limestone d. granite e. sandstone

Which source is most likely an authority on the subject? Dr. Vale, a pediatrician, discusses electrical circuitry on her home-improvement website. Jonah, an amateur cook, teaches his son how to make the best grilled cheese sandwiches.

What methods can be used to break down substances into elements

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?