When a chemical change happens we sometimes see a colour change. What other observations tell you that a chemical change is happening?

the force experienced by an electron in a field between parallel plates is proportional to which of the following?

While watching ocean waves at the dock of the bay, Otis notices that 10 waves pass beneath him in 30 seconds. he also notices that the crests of successive waves exactly coincide with the posts that are 5 meters apart.

What is true about an object in free fall?

Compare and contrast ultraviolet light with infrared light using wavelength, frequency, and energy.

All of the following describe climate except it is hot today the average temperature of a place the average precipitation of a place the average number of sunny days of a place

17. (a) Will the electric field strength between two parallel conducting plates exceed the breakdown strength for air (3.0*106 V/m) if the plates are separated by 2.00 mm and 5.

What property of sound enables us to distinguish one sound source from another?

The table below shows the right ascensions of two stars at a location. Star 1 - 4 right ascension (in Hour) Star 2 - 3 right ascension (in Hour) Which of these statements is correct about the stars?

H-2 + H-3 → He-4 + Consider the nuclear reaction that takes place in the sun. Two nuclides of hydrogen fuse to form helium. Is helium the only product of this reaction? If no, identify any additional products. A) Yes, He-4 is the only product. B) No.

Hat is a scientific theory? Make up your own scientific theory.