An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time. Thus, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.
Alkaline Earth Metals and Alkali Reactive metals because they need more electrons to acquire octet.
The kinetic energy that the liberated electron has in eV based on the given values is :
10.28 eV.
<h3>Explanation:</h3>
- 1 eV is the kinetic energy gained by an electron or proton when acted upon by a 1 volt potential difference. E = QV is the formula for energy in terms of charge and potential difference.
A photoelectron's maximum kinetic energy is given by
Emax = hf - W
- where h is Plank's constant,
- f is the incident photon's frequency, and
- W denotes the metal surface's work function.
here given,
f = 3.62 x 10¹⁵ Hz
W = 4.70 eV
by recalling the equation for a photoelectron's maximum kinetic energy with given values,
Emax = hf - W
= ((4.14 × 10⁻¹⁵eV.s)(3.62 x 10¹⁵ Hz)) - (4.70 eV)
= 10.28 eV
As a result, we discovered that the maximum kinetic energy of electrons is 10.28eV.
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2000N in the direction of tugboat B
Explanation:
Given parameters:
Force by tugboat A = 2000N
Force by tugboat B = 4000N
Unknown;
Net force on barge = ?
Solution:
The net force on the barge would be the resultant of the force on the barge.
Net force = Force on tugboat A - tugboat B
Net force = 2000N - 4000N = -2000N
The net force is directed towards the direction of the second barge i.e tugboat B of greater force.
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