Which of the following is a complex machine? 1) piano 2) bottle opener 3) shoehorn 4) doorknob

2. A 4.0 kg ball moving to the right at 1.2 m/s collides inelastically with a 1.0 kg ball at rest. What will the velocity of the combined balls be after the collision? 3. An object is lowered into a deep hole in the ground.

when you jump, you move upward with a certain amount of momentum. Earth moves downward with an equal amount of momentum. Why doesnt anyone notice earths motion

Karen massed an object 3 times using the same equal arm balance and gram massed. Her results were 18.324 g 18.308 g and 18.342 g. How could she best report the mass of the object

How do i do a Wavelength and frequency problem

During a snowball fight two balls with masses of 0.4 kg and 0.6 kg, respectively, are thrown in such a manner that they meet head on and combine to form a single mass of 1 kg. the magnitude of intial velocity foreach is 15 m/s.

Why is the use of carbon-14 limited

Why do cell sometimes need to use active transport?

Why is carbon and nitrogen important?

Gizmo answer sled wars

3. What is the kinetic energy of a 1300 kg car moving at 26.3 m/s?