A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs. A mixture can usually be separated back into its original components. Some examples of mixtures are a tossed salad, salt water and a mixed bag of M&M's candy.
The answer here would be infrared waves. Hot objects and humans give off heat in the form of infrared light, thermal imaging technology in the goggles enable them to catch this light emitted by these objects
Answer:
Work by normal force is 1335 J
Work by frictional force is -796.8 J
Explanation:
Work done due to applied force is given by the product of magnitude of force and distance pushed.
Work done=Fd
Substituting 178 N for F and 7.5 m for d then
Work done by normal force=178*7.5=1335 J
Work done due to frictional force will be product of normal force, distance and coefficient of kinetic friction.
Work due to frictional force is -0.19*57*9.81*7.5=-796.81725 J
The normal and gravity forces do not work since they are at 90 degrees.