Answer:
Yes
Explanation: The Answer is True not false
concentration is the ratio of solute in a solution to either solvent or total solution.
Answer:
2 x 10^20 N
Explanation:
Me = 5.98 x 10^24 kg
Mm = 7.36 x 10^22 kg
r = 3.82 x 10^5 km = 3.82 x 10^8 m
The gravitational force between earth and moon is
F = G Me x Mm / r^2
F = (6.67 x 10^-11 x 5.98 x 10^24 x 7.36 x 10^22) / (3.82 x 10^8 x 3.82 x 10^8)
F = 2 x 10^20 N
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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Answer:
The force of the floor on his shoes is bigger than his weight.
Explanation:
From Newton's third law of motion which states that to every action there is an equal an opposite reaction, we can say that the ground exerts additional force on the basketball player, thereby overcoming his weight and pushing him off the ground.
So, when the basketball player jumps, his muscles contract or extend appropriately which in turn creates an additional force on the ground. Hence, the force of the floor on his shoes is bigger than his weight.
