A chemical equation is balanced by changing or adding what?

A member of the marching band tunes their trombone inside their school. When they walk out to the field the instrument goes out of tune. What is the best explanation for this? A) The instrument expands or contracts as temperature changes.

The two continental ice sheets that exist in the world today are:

The position of an object as a function of time is given by [x (t) = at^3 - bt^2 + ct - d] where (a = 3.6, b = 4.0, c = 60 m, and d = 7.0). (a) Find the instantaneous acceleration at t = 2.4 s. (b) Find the average acceleration over the first 2.4

What is the relationship between mass and linear momentum

A hockey puck slides on the ice and eventually stops. How would Newton interpret this behavior?

What color does Indigo turn things?

Which equation expresses the conservation of mechanical energy in a system that involves kinetic energy, gravitational potential energy, and elastic potential energy?

Which of these is an example of temperature changing over time? A. a pan cools off on the stove B. a frozen dinner sits in the freezer C. a mug is at room temperature on the counter D. two glasses of water are filled from the tap and mixed together

A syrup added to an empty container with a mass of 115.25g. When 0.100 pint of syrup is added, the total mass of the container and syrup is 182.48g. Determine the density ... ?

MOST high schools teach biology, then chemistry, then physics. What do you see as some of the disadvantages of the traditional sequence to both students and teachers.