A Danish astronomer who used the diameter of the earth's orbit in his calculation of the speed of light was.

roemer

michelson

galileo

A helicopter is ascending vertically with a speed of 5.52 m/s. At a height of 125 m above the Earth, a package is dropped from the helicopter. How much time does it take for the package to reach the ground?

What is the is the 94th element of the periodic table

What is the range of wavelengths for fm radio (88 mhz to 108 mhz) ?

Suppose two chemicals are reacted together. It takes 750 kJ of energy to break the bonds of the reactants and 1050 kJ of energy are released by the formation of the products. Which statement is true about the reaction? The reaction is exothermic.

The greenhouse effect plays a major role in the climate of a planet. Visit the Greenhouse Effect AstroTour (Links to an external site.), and use what you learn there to choose all the statements below that are correct. Note that 273 K = 0°C = 32°F.

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.

landslides and mudslides caused by lava flows are ___ deadly than the lava flow itself. a. more b. less

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor