Answer: Time.
Explanation:
Hey there!!!
The reason is,
According to the question we have,
Initial velocity = 0m/s { as it starts from rest}.
Final velocity = 650 m/s
acceleration = 5m/s^2.
Looking on this formula,
Where "v" represents final velocity, "u" represents initial velocity and "a" represents acceleration. We dont have is time "t".
So, it's obvious that tine is an unknown variable.
<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
To find the average speed, we must calculate the total distance covered by the object and then divide it by the total time of the motion.
The total distance covered by the object is
while the total time of the motion is
Therefore, the average speed of the object is
Answer:
ΔT = 1.22*10^-3 °C
Explanation:
First, you calculate the potential energy of the bird when it is at 35 m high. The potential energy is also the mechanical energy of the bird in this case.
m: mass of the bird = 0.75kg
g: gravitational constant = 9.8m/s^2
h: height = 35m
All this energy is given to the water. You use the following formula in order to calculate the change in temperature:
m: mass of the water = 50kg
c: specific heat of water = 4186 J/kg°C
Q is equal to U (potential energy of the bird) because the bird gives all its energy to water. By doing ΔT the subject of the formula you obtain:
hence, the maximum rise in temperature is 0.00122 °C
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It is about density. The less dense object will tend to float when put into the water. For example, oil is denser than water so the result of the mixture would make oil float. Sinking objects would only mean that it has an equal or greater mass than water.
