Who thinks there is a 9th planet (not counting Pluto) and tell me why

Which characteristics are drawbacks of the domestication of dogs? They're dependent on people for resources and often can't survive on their own. They can't mate with wolves, even though they're the same species.

Roemer's experiment failed because of his ignorance about the what

What is the period of wave if the wavelength is 100m and the speed is 200m/s

Divide 0.0081 by 300 seconds and express the answer in scientific notation.

How many moles are in 1200 grams of ammonia, NH3

Is it legal in Florida for a math teacher forces the kids to do push ups?

Acceleration is best defined as the rate of change of blank of an object

Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?

If a glass is knocked off of a table that is 1.4m tall, how long does it take for the glass to hit the ground?

Imagine riding On a merry-go-round at the center. As you walk to the outer edge, the merry-go-round slows in order to conserve angular momentum. True or false?