Answer:
584.3 m at above the positive x-axis
Explanation:
We have to find the magnitude and direction of the resultant vector. In order to do that, we have to resolve each vector along the x- and y- direction first.
Resolving the vector L:
Resolving the vector M:
Now we can find the components of the resultant vector by adding the components of each vector along each direction:
So the magnitude of the resultant vector is
While the direction is given by:
But since is negative and is positive, it means that this angle is measured as angle above the negative x-axis; so the direction of the vector is actually
Slight changes in the chemical structure can drastically affect the properties of the compound. Even isomers, compounds with the same chemical formula but different structures, can have drastically different properties.
i don’t really know if there is supposed to be a “do” in front of the question but that’s what i found!
Answer:
B. positive; negative.
Explanation:
From the viewpoint of Principle of Energy Conservation and Work-Energy Theorem, we notice that gravity represents a conservative force, associated with gravitational potential energy, whereas air resistance is a non-conservative force, associated with dissipated work. Therefore, the work done by gravity is positive and work done by air resistance is negative. Therefore, the correct answer is B.