It represents the depolarization of the atria.
<u>Explanation:</u>
The P wave speaks to the depolarization of the left and right chamber and furthermore relates to atrial compression. Carefully, the atria contract a brief moment after the P wave starts. Since it is so little, atrial repolarization is typically not unmistakable on ECG.
In an ordinary ECG, there's three particular waves. The primary wave is the P wave, which speaks to the depolarization of the atria. This happens directly before the atria agreement and drive blood into the ventricles. The following wave is known as the QRS wave.
Answer: B. It is directed to the left.
Explanation:
Gravitational force is an attractive force, this is stated by Newton's law of Gravitation:
<em>"The force exerted between two bodies of masses m1 and m2 and separated by a distance is equal to the product of their masses and inversely proportional to the square of the distance"</em>
This means both m1 and m2 are mutually attracted.
Hence, if the force exerted on m1 by m2 is directed to the right, the force exerted on m2 by m1 must be logically <u>directed to the left.</u>
Answer:
Nucleus A with 7 protons and 7 neutrons and Nucleus C with 7 protons and 5 neutrons are isotopes of the same elements
Explanation:
Isotopes are elements that have the same atomic structure but different molecular structure. An atom that has the same atomic number but different mass number are known to be isotopes.
The proton of an atom is the same as its atomic number while the sum of the proton and neutron is equal to its mass number.
According to the question, nuclei that has the same number of proton are isotopes of the same element. Therefore nuclei A and C with 7 protons each are isotopes of the same element since they have the same atomic number i.e number of proton = atomic number.
Their atomic masses of nuclei A and C are 14 and 12 respectively
Answer:
6.4×10⁻¹⁹ C
Explanation:
From the question,
V = E×d.............. Equation 1
Where V = electric potential, E = Electric Field, d = distance moved by the particle.
Given: E = 75 N/C, d = 10 m.
Substitute into equation 1
V = 75×10 = 750 V.
Also Using,
W = qV.................. Equation 2
W = Work done by the particle when it moves, q = Particles charge
make q the subject of the equation,
q = W/V............ Equation 3
Given: W = 4.8×10⁻¹⁶ J, V = 750 V
Substitute into equation 3
q = 4.8×10⁻¹⁶/750
q = 6.4×10⁻¹⁹ C
If it follows the 1st law of thermodynamics it would also remove heat of 314J from the food inside the refrigerator.
