A 2.3-kg object traveling at 6.1 m/s collides head-on with a 3.5-kg object traveling in the opposite direction at 4.8 m/s. if the collision is perfectly elastic, what is the final speed of the 2.3-kg object?

Which things determine an element's electronegativity? Check all that apply. A. The size of the atom of that element B. Whether the element is a gas or a liquid at room temperature C. The number of neutrons D.

A 0.155 kg arrow is shot upward at 31.4 m/s. What is its potential energy (PE) when it leaves the bow?

If 60 lbs of force must be applied to the valve for it to open, how much upward force must push rod X apply for the valve to open?

Every choice has a positive or negative consequence. a. True b. False

How does the magnetic force vary with distance?

What is the term for the basic unit of electric current? The basic unit of electric current is the.

When a sailboat overtakes a powerboat, which vessel is the stand-on vessel?

Both matter and energy can eneter and exit which of the following systems? A. open only B. both open and closed C. isolated only D. both closed and isolated

1. Find the charge if the number of electrons is 4 x 10-18

Which of the following describes resistance force?