Which physical property is shown by scratching one material with another

One railroad car rolls towards another. Describe the properties of the first car that determine its momentum and how it would impart an impulse to the second car.

How does the Law of Conservation of Energy impact the amount of energy that is available on our planet?

To find the maximum power being delivered to the inductor in the application problem, what is the first step?

Which type of power plant uses energy directly from the sun to generate electricity? A. Wind B. Hydroelectric C. Radiant D. Coal

Unpolarized light passes through two ideal Polaroid sheets. 12.3% of the incident light is transmitted. What is the angle between the transmission axes of the Polaroid sheets?

A building that is 105.50 ft. feet tall is casting a shadow that is 37.50 ft. feet. If the building next to it, is casting a shadow of 41.00 ft. feet, how tall is that building?

What is the technical name for super glue type adhesives

On his fishing trip Justin takes the boat 25 km south. The fish aren't biting so he goes 10 km west. He follows a school of fish 15 km north. What distance did he cover? What was his displacement?

n open rectangular tank is filled to a depth of 2 m with water (density 1000 kg/m3). On top of the water there is a 1 m deep layer of gasoline (density 700 kg/m3). The width of the tank is 1 m (the direction perpendicular to the paper).

Is the sun considered a star?