100 points for those who can help and brainliest A small, closed chamber of gas is heated. When the gas in the chamber expands, it does 5 J of work on a piston. The gas has an initial energy of 8 Jand a final energy of 30 J. Considering the equation for the first law of thermodynamics (AU = Q + W). does the work done in this scenario have a positive or negative value? and also how much heat is added to the chamber?

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop

What kind of waves require a medium to travel? question 6 options: light waves mechanical waves all waves need a medium to travel electromagnetic waves