The illuminance on a surface is 3.5 lux, and the surface is 2 meters from the light source. What's the intensity of the source?

The collision of the deep impact probe with the nucleus of comet tempel 1 in 2005 revealed the nucleus as a rubble pile held together by

Inside a star the force of gravity is balanced by

An oscillating object takes 0.10 s to complete one cycle; that is, its period is 0.10 s. what is its frequency f?

What are 3d glasses made of? a) two filters with vertical polarization b) two filters with horizontal polarization c) two filters with polarization axes that differ by 45 d) two filters with polarization axes that differ by 90

What are three areas of science that rely on physical science?

How does gravitational force and electric force compare?

There are two types of addiction, psychological and physical. A. True B. False

What two gases probably dominated precambrian earth's atmosphere?

a fast ball travels at about 161kilometers/hr if this fast ball could keep its speed how long would it take this ball to travel 0.15 terameters?

You are traveling upstream on a river at dusk. you see a buoy with the number 4 and a flashing red light. what should you do?