D) decreases, inverse
Explanation:
The average speed of each lap decreases. This is an example of an inverse relationship.
Speed is the rate of change of distance with time. In calculating the average speed, we should understand that the total length of path is taken into consideration and so is the total time taken.
Average speed = 
It was explained that after every 5 seconds the speed of the runner becomes slower.
There is definitely an inverse relationship between average speed and the total time taken.
An inverse relationship is such that as one variable increases, the other diminishes.
As average speed reduces the time taken increases.
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Answer: One neutron
Explanation:
one neutron 1/0n
Sum up the mass numbers on the right 99 + 135 + 2 = 236.
The sum of the mass numbers on the left should equal 236. 235 + 1 = 236
Answer:
The correct answer is
a) 1, 2, 3
Explanation:
In rolling down an inclined plane, the potential energy is Transferred to both linear and rotational kinetic energy thus
PE = KE or mgh = 1/2×m×v² + 1/2×I×ω²
The transformation equation fom potential to kinetic energy is =
m×g×h = 
= 
= 
=
Therefore the order is with increasing rotational kinetic energy hence
the first is the sphere 1 followed by the disc 2 then the hoop 3
the correct order is a, 1, 2, 3
The mass of 5 kg on the Earth has a greater weight than the mass of 20 kg on the moon.
Explanation:
The weight of an object is given by
where
m is the mass of the object
g is the acceleration of gravity
On the Earth, the acceleration due to gravity is
So a mass of m = 5 kg on the Earth would weigh
On the moon, the acceleration due to gravity is
So a mass of m = 20 kg on the Moon would weigh
So, the mass of 5 kg on the Earth has a greater weight than the mass of 20 kg on the moon.
Learn more about forces and weight:
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