Vectors have a magnitude and direction whereas scalars only have a magnitude. The dot product of two vectors is a scalar.
The correct answer is (d), electrons are in probable cloud location.
An atom is made up of three fundamental particles, electron, proton and neutron. Proton and neutron are located in the nucleus, while the electrons orbit the nucleus in relative large orbit, however the exact position of the electron in the shall is highly unpredictable, therefore they are assumed to be in probable cloud location where the probability of finding an electron is very high.
The force is an additive quantity allows to find the result for the total force exerted by the two people is:
= 54 N
Newton's second law gives a relationship between the net force, the mass and the acceleration of the body, when the acceleration is zero, this expression is called the equilibrium condition.
∑ F = 0
Where F is the force that is a vector quantity and therefore additive.
They indicate that the two people pull with a force of 23 N and 31 N in the same direction.
Let's calculate.
= 23 +31
= 54 N
In conclusion, using that force is an additive quantity, we can find the total force exerted by the two people is:
= 54 N
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No, the pins do not have the same velocity when they are knocked down.
Explanation:
Speed is a scalar quantity while Velocity is a vector quantity.
A scalar quantity has one component that is the magnitude of that quantity. A vector quantity on the other hand has two components. First is the magnitude of the quantity and the second component is the direction.
Velocity is a vector quantity and it has two components; the magnitude which is the same as the speed and the direction.
In the given situation, the pins when knocked down have same speed but the direction is different. If one component of a vector quantity changes, the quantity is said to be different. We cannot say that two bodies moving with same speed in different directions have same velocities.
Keyword: Vector Quantity
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