Suppose a system receives a "deposit" of work from the surroundings and loses a "withdrawal" of heat to the surroundings. can we determine the sign of δe for this process?
a. no, because we are not given specific values for w and q.
b. no, because it an open system.
c. yes, because we know the signs of w and q.
d. no, because we do not know the temperature of the system

A. No, because we are not given specific values for w and q.

Explanation:

The change of internal energy of a system is:

ΔE = q + w

where q represents heat and w represents work.

It is necessary to know the magnitude and the sign of q and w in order to know if the system's internal energy is increasing or decreasing.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.