Fill in the blank --
A radio controlled car rolls 10 m south, then reverses direction and rolls 8 m north.
The car has traveled a distance of 18 m and has a displacement of 2 m south
↑ ↑ ↑ Hope this helps! (The bolded number is the unknown value/blank)
Answer:
The time required by the impulse to travel from foot to brain equals 0.019 seconds
Explanation:
For uniform motion the distance, speed, time are related by the equation
In our case since the person is 1.90 meters tall so the nerve impulse will have to cover a distance of 1.90 meters at a speed of 100 m/s.
Hence the time required for the impulse to travel from foot to the brain can be calculated as
This is a question that makes us REALLY want to know what "Which" means.
If you included a list of answer choices with your question, then the correct formula isn't on it.
The formula for converting temperature from degrees Celsius to degrees Fahrenheit is:
<em>°F = 1.8 · (°C) + 32</em>
Answer:
v = c / n (n = 1 for air)
v = c / 1.33 = 3 * 10E8 m/s / 1.33 = 2.25 * 10E8 m/s
Answer:
- The elements Li, C, and F, are all in the period (row) # 2 of the periodic table, and, in consequence, those atoms have two energy levels (main quantum number), n = 1 and n = 2, around the nucleus.
Explanation:
The period number of an element in the periodic table is always equal to the number of main energy levels that the atoms have.
Li (lithium), C (carbon), and F (fluor) form part of the period 2 of the periodic table.
The complete list of elements of the period 2 of the periodic table is Li, Be, B, C, N, O, F, and Ne.
The periods are numbered from 1 through 7.
The elements of period 1 (H and He) have one main energy level, the elements in period 2 have two main energy levels, the elements in period 3 (Na, Mg, Al, Si, P, O, Cl, and Ne) have three main energy levels. So, as you can infere, the period number always equals the number of main energy levels of the atoms of the element.
