Answer:
frequency
Explanation:
I think it's frequency because when frequency of a sound wave increases we feel increase in pitch
The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.
<h2>Answer</h2>
25 miles/hour
<h2>Explanation</h2>
Given that,
<em>A pilot can travel with wind = 416miles </em>
<em>A pilot can travel against wind = 336miles</em>
<em>A pilot can speed without wind = 235miles/hour </em>
<em />
<em />
let wind speed = v miles/hr
pilot's speed with the wind = 235<em>+ v</em>
pilot's speed against the wind = 235 - v
<h2>
Time = distance / speed</h2>
416 / (235 + v) = 336 / (235 - v)
416(235 - v) = 336(235+v)
97760 - 416v = 78960 + 336v
97760 - 78960 = 416v + 336v
18800 = 752v
v = 18800/752
v = 25 miles/hour
wind speed = 25 mph
Answer:
Part B)
v = 4.98 m/s
Explanation:
Part a)
As the ball is rolling on the inclined the the friction force will be static friction and the contact point of the ball with the plane is at instantaneous rest
The point of contact is not slipping on the ground so we can say that the friction force work done would be zero.
So here in this case of pure rolling we can use the energy conservation
Part b)
By energy conservation principle we know that
initial kinetic energy + initial potential energy = final kinetic energy + final potential energy
so we will have
here in pure rolling we know that
now from above equation we have
now we have
now plug in all values in it