27 Question 3 of 7
What is the change in internal energy if 30 J of thermal energy is released
from a system, and the system does 40 J of work on the surroundings? Use A
U = Q-W.
A. 10 J
ОО
B. -70 J
C. -10 J
D. 70J

What is the length x of the side of the triangle below? (hint: use the cosine function)

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.