In which of the Earth's layers are diamonds formed? -

Diamonds form in the Earth's mantle, a thick layer between the thin crust and Earth's metal core.

F = G m1*m2 / r^2 => [G] = [F]*[r]^2 /([m1]*[m2]) = N * m^2 / kg^2

That is one answer.

Also, you can use the fact that N = kg*m/s^2

[G] = kg * m / s^2 * m^2 / kg^2 = m^3 /(s^2 * kg)

A diverging lens has a focal length of magnitude 21.8 cm and the images are located behind the lens.

(a) u = -10.9 cm

1/v= 1/10.9 - 1/21.9

v= 21.8cm

Behind the** lens.**

(b) 1. Virtual

2. Virtual

3. Real

(c) m = v/u

1. Erect/ Upright

2. Upright

3. **Inverted**

(d) m = v/u

1. m = -43.6/-43.6 = 1. ** Magnification **= 1.

2. infinity.

3. m = 21.8 / -10.9 = -2. Magnification = -2.

Therefore, these are the answers for above given question.

To know more about **diverging lens **visit

brainly.com/question/3140453

#SPJ4

In a closed system, energy in form of heat (work) can be exchanged but not matter.

The answer to your question is C.

Hope it helped!

**Answer:**

**Explanation:**

<u>Net Force
</u>

The second Newton's law explains how to understand the dynamics of a system where several forces are acting. The forces are vectorial magnitudes which means the x and y coordinates must be treated separately. For each component, the net force must equal the mass by the acceleration, i.e.

The box with mass m=20 kg is pulled by a rope with a angle above the horizontal. It means that force (called T) has two components:

We'll assume the positive directions are to the right and upwards and that the box is being pulled to the right. There are two forces in the x-axis: The x-component of T (to the right) and the friction force (to the left). So the equilibrium equation for x is

There are three forces acting in the y-axis: The component of T (upwards), the weight (downwards), and the Normal (upwards). Since there is no movement in the y-axis, the net force is zero and:

Rearranging:

Solving for N in the y-axis:

The friction force is given by

Replacing in the equation for the x-axis, we have

Replacing the formula for N in the equation for the x-axis

Operating and rearranging

Solving for T:

Plugging in the given values: