In order for two objects to have the same temperature, they must a. be in thermal equilibrium.

b. be in thermal contact with each other.

c. have the same relative "hotness" or "coldness" when touched.

What's the third prong on an electric plug called?

1. Which wave is NOT part of the Electromagnetic Spectrum? A. Infrared Wave B. x-ray C. sound wave D. radio wave

If oxygen and steel wool are combined is it a physical change or chemical change?

In which latitude would you most likely find a hurricane forming? a. 40 b. 30 c. 0 d. 15

You're engineering a new cell phone, and you'd like to incorporate the antenna enwrely within the phone, which is 9 cm long when closed. the antenna is to be a quarter-wavelength long-a common design for verwcally oriented antennas.

Race car drivers must slow down as they make turns on the track. This is best explained by the law of inertia. Which statement best describes inertia for the car going around a turn? A) A body in motion stays in motion at the same speed.

What is is the ratio of the distance over which the force is applied to the distance over which the load is moved

What factor can increase the potential energy of an object? A Decrease in speed B Decrease in density C Increase in temperature D Increase in height from the ground?

Microwave ovens emit microwave energy with a wavelength of 12.3 cm. What is the energy of exactly one photon of this microwave radiation?

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?