Why do some elements have symbols that don't use letters in the element's name?

1. An object travels 15 m in 3 s. What is the speed of the car? 2. An object travels 20 m in 4 s heading south. What is the velocity of the object?

A group of atoms with aligned magnetic poles are known as which of the following? A. current B. poles C. domains D. fields ... ?

A girl launches a toy rocket from the ground. The engine experiences an average thrust of 5.26 N. The mass of the engine plus fuel before liftoff is 25.0 g, which includes fuel mass of 12.3 g. The engine fires for a total of 1.90 s. A.

A 1000-kg car moving at 20 m/s slams into a building and comes to a halt. Consider questions a and b below. Which question can be answered using the given information and which one cannot be answered? Explain. A. What impulse acts on the car? B.

Why mercury is preferred over alcohol in thermometer

A glass window is a clear object that light passes through as it travels in a straight line. This is a good example of A. refraction of light. B. transmission of light. C. absorption of light. D. reflection of light.

Why is net force a vector sum A. All forces have direction and magnitude B. Forces can only be attractive C. All forces are contact forces D. There are four fundamental forces

Does the elf owl's small size allow it to live in cacti

If grapefruit juice has a ph of 3.0 and egg white have a ph of 8.0, which contains more h + ions? how many more?

Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e. What is the wavelength,? Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e.