An open system is a system in which both matter and energy are exchanged with the surroundings.

a. true

b. false

A 4 kg bird is flying with a velocity of 4 m/s. What is its kinetic energy?

What determines the properties of elements? Question 25 options: the number of electrons that fill the outer shell the total number of electrons the number of electron shells the number of neutrons the average atomic mass

1. A truck was pulling a R. V. Away from the end of the cliff. The chain broke and the RV fell to the ground. If the truck had an initial velocity of 2 m/s, what was the distance it fell from the edge of the cliff? The cliff is 280 ft tall.

What type of wave is produced when the frequency of a visible light wave is increased

The component of two or more forces acting together results in a single force, and is called the resultant force. What term describes putting the component forces together to find the resultant?

A student examining a joint observes collagen-rich connective tissue fibers linking the bones, but finds no synovial cavity. Which structural classification fits the observed joint?

How to identify additional materials

Tarzan runs at 6 m/s and grabs a vertical vine (negligible mass) 4.1 m long which is tied to a tree at the top. Tarzan swings up. Determine the maximum height Tarzan will swing up and the angle the vine makes respect to vertical.

What is the safest place to be amid the coronavirus?

What is the change in internal energy if 60 J of heat are added to a system and the system does 40 J of work on its surroundings? Use AU = Q-W.