Answer:
The slope of a distance-time graph indicates the rate of change of distance and it is termed as speed.
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Answer:
Answer: Say the big boy is 40kg and the small boy is 20kg... ... ...then by the rule that moments around a fulcrum or pivot should be equal for equilibrium, the distance of big boy from pivot=half of dist of small boy from pivot
Answer:



Explanation:
= Mass of baby = 3 kg
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
r = Distance between objects
Gravitational force of attraction is given by

The force between baby and obstetrician is 

The force between the baby and Jupiter is 

The force between the baby and Jupiter is 
Answer:100 meters per min
Explanation:
To solve this problem we will apply the first law of thermodynamics and we will make a balance between the heat transferred, its internal energy and the total work. Recall that for gases the definition of work can be expressed in terms of its pressure and volume. Let's start

Here,
dU = Internal Energy
dW = Work
But internal energy is unchanged, then


Where
= Change in Volume
P = Pressure
Finally, the expression of the heat transferred can be expressed in terms of pressure and volume, so it would end up becoming

Replacing,


Therefore the correct answer is B.