Explain why and how theories may be changed or replaced over time.

What is the particles instantaneous speed at t=16 sec

A drag racer leaves the starting line and increases its speed up to 200 miles per hour by the time it crosses the finish line. What must have changed? A. only its speed B. only its velocity C. both its speed and its velocity D.

another box has a normal force of 100 N acting on it. You start dragging the box across the floor with horizontal force. The coefficient of kinetic friction between the box and the floor is 0.3. Whta is the force of friction on the box?

Is fertilizer a living thing or non living thing?

Two metals of equal mass with different heat capacities are subjected to the same amount of heat. which undergoes the smallest change in temperature?

Identify what is required to calculate the atomic number and atomic mass of an element

What device is used to measure the current in a circuit

A lever allows a 35 N load to be lifted with a force of 7 N. What is the mechanical advantage of the lever?

An object moves from the position + 16m to the position + 43m in 12s. What us the total displacement

Which factor is most important in determining climate? A. Longitude B. Latitude C. Rainfall D. Temperature