**Answer:**

<em>It is recommended that you exercise within 55 to 85 percent of your maximum heart rate for at least 20 to 30 minutes to get the best results from aerobic exercise. The MHR (roughly calculated as 220 minus your age) is the upper limit of what your cardiovascular system can handle during physical activity</em>.

(I think) ¯\_(ツ)_/¯

**Answer:**

There are 5 general layers; organism, population, community, ecosystem, and biosphere.

**Explanation:**

Hope this helps!

The relationship between electrical potential energy
(PE), capacitance (C), and potential difference (V) can be expressed through
the equation,

<span> V = PE / C</span>

V is equal to the quotient of potential energy and
capacitance.

When we substitute the known values from the item,

<span> V = 73 J/ 120 C</span>

<span> V = 0.61 J/C</span>

<span>Thus, the voltage or potential difference is equal to
0.61 V. </span>

A. Instinct

Instinct is a behavior you inherit from your ancestors

**Answer:**

16.9000000000000001 J

**Explanation:**

From the given information:

Let the initial kinetic energy from point A be = 1.9000000000000001 J

and the final kinetic energy from point B be = ???

The charge particle Q = 6 mC = 6 × 10⁻³ C

The change in the electric potential from point B to A;

i.e. V_B - V_A = -2.5 × 10³ V

According to the work-energy theorem:

-Q × ΔV = ΔK