"<span>increases when pressure decreases". Pressure and volume of gasses are related from Boyle's law, which states that Pressure is proportional to 1/V, so as pressure decreases, volume increases. </span>
Answer:
At top vertical componant of velocity is zero
Time taken by the car to travel 300 miles is 4.615 hours.
<h3>What is speed?</h3>
The speed of any moving object is the ratio of the distance traveled and the time taken to cover that distance.
Given is the distance d = 300 miles and the speed s = 65 miles/hour, then the time taken t will be
s=d/t
65 = 300/t
t= 4.615 hours
Thus, time taken by the car to travel 300 miles is 4.615 hours.
Learn more about speed.
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Answer:
12.5 J
Explanation:
Force, F = 25 N
Distance, d = 0.5 m
The direction of force and the displacement is same.
Work is defined as the product of force in the direction of displacement and the displacement.
Work = Force x displacement x CosФ
Where, Ф be the angle between force and the displacement
Here, Ф = 0°
So, W = 25 x 0.5 x Cos0°
W = 12.5 J
Efficiency or 
is calculated by formula: 
where 
also efficiency has no unit.
Now put in the data and calculate the efficiency.
The efficiency of the machine is 0.8
If you want to get percentage just multiply by 100 and you get 80%
Hope this helps.
r3t40
