In an atom that has an electron configuration of 1s^2 2s^2 2p^3. The total number of electrons in its sublevel of highest energy is 3.
Electronic configuration represents the number of electrons in the excited state or in the subshells of an element.
1s^2 2s^2 2p^3 is the electronic configuration of nitrogen i.e. N7.
The atomic number of nitrogen is 7 and the atomic mass is 3. Hence, the electrons are in the 's' and 'p' subshells of the main shell.
This electronic configuration shows that nitrogen is in an exciting oxidation state and has 3 electrons in its highest energy level.
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The temperature scale used in science is the Kelvin scale. The correct option among all the options given in the question is option "a". This is the standard scale used for measuring in astronomical and thermodynamics fields. The other scales can create complications as different countries use different type of scales.
Answer:
The instantaneous velocity of the rocket the moment before it hits the ground is 50 m/s.
Explanation:
Given;
initial velocity of the rocket, u = 50 m/s
Determine the maximum height reached by the rocket.
at maximum height reached by the rocket, the final velocity, v = 0
v² = u² -2gh
0 = 50² - 2(9.8)h
19.6h = 2500
h = 2500 / 19.6
h = 127.55 m
At maximum height, the time to reach ground is given by;
h = ¹/₂gt²
Before the rocket hits the ground the final velocity will be maximum;
v = u + gt
v = 0 + 9.8 x 5.1
v = 50 m/s
Therefore, the instantaneous velocity of the rocket the moment before it hits the ground is 50 m/s.
Answer:
The maximum velocity is 0.489 m/s
Explanation:
Maximum velocity (v) = angular velocity (w) × radius (r)
w = 33.33 rpm = 33.33×0.1047 = 3.4897 rad/s
r = 14 cm = 14/100 = 0.14 m
v = 3.4897×0.14 = 0.489 m/s
Answer:
The weight of an automobile, W = 17640 N
Explanation:
Given that,
The mass of an automobile, m = 1800 Kg
The weight of an object is represented as the gravitational force acting on an object of mass 'm'. It given by the formula
W = m x g newton
Where,
g - acceleration due to gravity.
Substituting the given values in the above equation
W = 1800 Kg x 9.8 m/s²
= 17640 N
Hence, the weight of the automobile, W = 17640 N
