Which of the four fundamental forces is mainly responsible for contact forces? A. gravity B. weak nuclear force C. electromagnetic force D. strong nuclear force

A sample of iron receives 50. J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 100 J/kg°C, what is the mass of the iron sample?

Which organism is responsible for cervic cancer? Marta is infected with a sexually transmitted disease. Diagnosis reveals that she is infected with the

The brightness of a star is determined A) only by its distance from earth B) only by its size C) by both is size and distance from earth D) by its location in the night star

Under specific circumstances, waves will bend around obstacles. This type of bending is called

3. What is the mass of an object that is experiencing a net force of 200 N and an acceleration of 500 m/s"?

Which concept was supported by taking measurements of the same stars at night and then again during solar eclipses?

Which of these is a biotic factor? A) topography B) soil C) air D) bacteria

One reason it's often easy to miss and action reaction pair is because of?

Recently, some information about a distant planet was learned. It has a radius of 6000000 meters, and the density of the atmosphere as a function of the height h (in meters) above the surface of the planet is given by δ (h) =

Which of the following is not a good approximation of the relationship between independent and dependent variables? A. independent: first, dependent: next B. independent: input, dependent: output C. independent: cause, dependent: effect D.