Air is made of 80% nitrogen and 20% oxygen by volume. The densities of air and oxygen is 1.29kgm^-3 and 1.43kgm^-3 respectively. What is the density of nitrogen? Please specify your soultion,thank you!

Answer:

The torque about the origin is 5.0 N.

Explanation:

To calculate the torque (τ) about the origin, you need to know both the force (F) and the position vector (r) from the origin to the point where the force is applied. The formula for torque is:

τ = r × F

Where:

- τ is the torque vector.

- r is the position vector.

- F is the force vector.

In this case, you're given the force vector F = 5.0 y N, where "y" represents the unit vector in the y-direction.

Assuming that the particle is located at a position where the position vector r is given as (x, y), you need to express the position vector in terms of unit vectors. Since the force is applied along the y-axis, you can write the position vector as:

r = x i + y j

Now, you can calculate the torque:

τ = r × F

τ = (x i + y j) × (5.0 y N)

When you take the cross product, the component of the position vector along the direction of the force will contribute to the torque. In this case, only the y-component of the position vector (y j) is along the direction of the force (5.0 y N).

So, the torque about the origin is:

τ = y (5.0 y N)

Now, you can calculate the magnitude of the torque:

|τ| = |y (5.0 y N)| = 5.0 |y|^2 N

The magnitude of the unit vector "y" is 1, so:

|τ| = 5.0 N

The torque about the origin is 5.0 N.

Answer:

Emphasizes

Explanation:

The expression of an art is intelligible to those that understand it, as such to make an impression an artist has to emphasize the point they want to communicate

An art is an expression of the personal experiences of the artist or a reaction to events or to reveal the realities as seen by the artist such as global warming and the environment, so as to get the attention of people with the goal to change them, such that a good art changes the most people, hence the need for emphasis.

Answer:

A - emphasizes

Answer:

My answer is A.

Explanation:

by using a density triangle, you would have to cover up the density and then it will show you, m over v. so that means you would have to divide.