You use me everyday but let me rest at night. I have an identical twin beside me all the time. For some reason you always cover me up. I am not alive but I have a soul. What am I?

Enrique is given information about a satellite orbiting earth. r = 3.8 * 108 m t = 18 days in order to calculate the tangential speed of the satellite, what should enrique do first?

Where else could Snell's law be useful in determining the path of a light ray in your everyday life?

it took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 miles per hour. How many miles lie between the two cities?

What is the maximum and minimum wavelength of echolocation?

What is the capital of Ghana and also Togo.

For glass fragments to be individualized, what must be true? A. They must fit together B. They must have the same density C. They must look the same D. They must be the same color

In what way would a digital thermometer be preferable to those from a liquid-based thermometer? Digital thermometer readings are easier to use when performing calculations.

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

What happens to a light ray passing through the center of a lens?

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0° above the table, and it lands on the magazine 0.0770s after leaving the table. Ignore air resistance.